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Expert Answers about Wiring


  • Recommended Fifth Wheel Wiring Connection for 2017 Ford F-350 Super Duty
  • I spoke with a representative of Bargman, who told me that while # 50-97-410-010 will work with your 2017 Ford F-350 with the fifth wheel prep, there have been very, very rare occasions where it can read a trailer is connected when it is not. To avoid that issue, it is recommended that you use Bargman # 54701-007-010 for fifth wheel wiring with your '17 F-350. I've included a link to a video review of this product for you to take a look at.
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  • Hooking a Gooseneck Trailer with RV 7-Way Plug to 1999 International 9100 7-Way Round Plug
  • The first thing that you need is the Pollak Trailer Connector Adapter # PK12-724 which converts the 7-Way round connector on your 1999 International 9100 to a 7-Way blade style connector. This will plug into your 9100 and provide a pace to connect the gooseneck trailer wiring. The next step is to then use the Roadmaster Brite-Lite Wiring Converter # RM-732 on your trailer side wiring right behind the 7-Way. This converter takes separate brake and turn signals and combines them so that...
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  • Comparing Bargman Heavy Duty 7-Way Trailer Connector # 54006-057 to # 54006-009
  • The difference between the Bargman 7-Way, RV-Style Connector w/ 6' Heavy Duty Insulated Cable - Trailer End # 54006-057 and the 7-Way Molded Trailer End with 6' Cable - HD Blue Insulated # 54006-009 is the color coding of the wire inside. For instance # 54006-057 uses the red wire for left turn and # 54006-009 uses the red wire for the 12V power. The color coding between these two will be different even though the function locations will be identical on the 7-way blades. I've...
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  • How to Determine Wire Functions on Trailer to Install Furrion Vision S Side Cameras
  • You can determine which black wire on your trailer is ground by hooking your trailer up to your tow vehicle and turning your running lights on. This will cause one of the wires to have power. You can determine which is which using a circuit tester like part # PTW2992 or a multimeter like part # PTW1714. Once you know which wire carries which function you can attach the wiring of the Furrion Vision S Side Cameras # FCE48TASL. The black is ground, the brown is running lights, and the red...
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  • Making 7-Way to 6-Way Coiled Adapter with Alternate Pin Out
  • Best option would be the Bargman 7-way part # WG54006-046 which has a molded 7-way on one end and then unconnected wires on the other. You could then wire this to the part # PK11604 based on the pinout that you need.
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  • Recommended Trailer Wiring Harness for 2017 Toyota Tacoma
  • The Plug-N-Tow (R) Short Proof Powered Taillight Converter - Heavy Duty # 46365 can be used on your 2017 Toyota Tacoma and will work fine. However, I recommend a wiring harness that makes installation easier and doesn't require splicing that also draws power from the battery to protect your vehicle's electrical components. I recommend the Tekonsha T-One # 118685. This harness plugs into your factory wiring already present behind the tail lights with quick connects and then a hot lead...
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  • Recommended Trailer Wiring Harness for 2018 VW Tiguan
  • Both the Tekonsha # 119190KIT and the Zero Contact Harness # 119250KIT that you referenced are universal kits that will work on your 2018 VW Tiguan. With that being said, there are now custom fit options available for your 2018 model Tiguan that will be a MUCH easier installation. For this, I recommend the Tekonsha T-One Vehicle Wiring Harness # 118765. This will install by simply plugging into factory ports located inside the rear cargo area of the vehicle. Once the connections are...
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  • Wiring Diagram for Blue Ox 4-Way Round Connector
  • The Replacement 4-Wire Plug for Blue Ox Coiled Electrical Cord - Vehicle End - Qty 1 # 294-0805 is wired as the diagram shows. This is the color and function from the back of the connection where the wires to your towed vehicle attach. I've also attached a similar installation video to assist. You can use the Blue Ox 7-Wire to 4-Wire, Coiled Electrical Cord - 7' Long # BX88254. If you want a slightly longer cord with the visual to glow at night, you can use the Hopkins Endurance Flex-Coil...
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  • Parts Needed to Install 7-Way on 2011 Nissan Pathfinder
  • If your trailer does not have brakes your best and easiest route would be to use the adapter part # 37185. Your 4-way plugs into it's 4-way and you have both a 4-way and 7-way with just taillight functions. If you need trailer brakes you'll need quite a few more things. To star you'd need the part # 118281 for a 7-way. But you'd need to swap out the socket to the part # HM40975 as it will install and give you both the 4 and 7-way. For a brake controller I would recommend the Prodigy...
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  • Amp Ratings for 2-Way Trailer Connector
  • I reached out to the manufacturer, Buyers Products, who said that the 2-Way Trailer Connector - Horizontal Pins # 337TC2002 and 2-Way Trailer Connector - Vertical Pins # 337TC2012 can handle no more than 40 amps. I have added links to video reviews of both connectors for you to check out. In terms of prices, as with all online retailers they fluctuate on a constant basis due to many, many different factors, for example consumer demand and competitor pricing.
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  • How to Power Third Brake Light of 2017 Chevy Colorado
  • Your 2017 Chevy Colorado does not have a dedicated brake light circuit for powering a camper shell third brake light. Your best option would be to tap into your trailer wiring with the # 118158 and then run the red wire to the third brake light.
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  • Can 6-Way on Towed Vehicle be Hardwired to 7-Way Connector on RV
  • The easiest way to connect your towed vehicle to the 7-Way on your RV will be to use a cord like the Blue Ox 7-Wire to 6-Wire Coiled Electrical Cord # BX88206. This will allow you to quickly connect your tow vehicle to your RV by using the included coiled cable that features a 6-Way on one end and a 7-Way on the other. If you would rather hardwire the 6-way wires from the towed vehicle cord to the 7-Way, you can certainly do this. You will just need to make sure that you make the proper...
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  • Wiring For Trailer With Brakes For Compatibility With 7-Way Connector On 2016 Dodge 2500
  • Since your 2016 Dodge 2500 has a 7-way, I recommend just adding a 7-way trailer wire connector to your trailer like # H20046. This will give you a simple connection between your vehicle and trailer without converters. You can simply tape up the wires you aren't using at the trailer and leave them in your junction box. If you want a 7 way with junction box, you can use the Epicord 7-Way Molded Trailer Plug with Junction Box - 10' Long, # 277-000141. Adding this molded 7-way plug will...
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  • Trailer Brake Controller Installation in 2017 Mercedes-Benz Sprinter 2500
  • There is no plug-and-play brake controller harness for the 2017 Mercedes-Benz Sprinter 2500 so brake controller installation will be a hard-wire process. Under the driver's seat there should be a green plug. The wires to this plug can be tested with a circuit tester like # ALL640595 to confirm their function since vehicle wire colors are not always consistent. A brake controller like the Prodigy P2 # 90885 has 4 wires that require connection to the Sprinter. The black wire is...
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  • Difference Between 4-Pole to 7-way Wiring Adapters 47180 and 37185
  • Hopkins part # HM47180 is a 4-pole-to-7-way wiring adapter that is equivalent to the similar # 37185. The only real functional difference between them is that on part # 37185 the 4-pole trailer connector is located to the side of the 7-way, rather than under it as with # HM47180. Both adapters plug in at an existing 4-pole vehicle connector and re-format those lighting signals to the 7-way configuration. The 7-way can be wired, if desired, to add new functions by using the included pigtail...
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  • Making a 6-Way Square Adapter for an Artic Fox Camper
  • We do have 6-Pole Square Trailer Wiring Connector Kit (Car and Trailer Ends) # 37995 that you can use for your Arctic Fox camper. This is both the male and female ends. But the wires on them are 18 gauge. You could replace the ground and power wires with 10 gauge wire if you wanted to though it make take a little persuasion to get the 10 gauge wire to mate up to the pins in the connectors. We sell 10 gauge wire # 10-1-1 by the foot or you can get # 10-2-1, also sold by the foot, which is...
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  • Trailer Wiring Harness for a 2005 Ford Escape
  • Your 2005 Ford Escape has what is called a separate or 3-wire system. This means that it has turn signals and brake lights that are on different circuits. Trailers have what is called a combined or 2-wire system which means the brake lights and turn signals are on the same circuit. In order to have the proper functions from a vehicle side 4-Way you will need a wiring harness that has a converter. The converter takes the separate signals from the vehicle and combines them so that the 4-Way...
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  • Recommended Trailer Wiring Harness for 2017 Chevy Bolt
  • The wiring harnesses are basically the similar harness from different manufacturers. I personally recommend the Upgraded Modulite Vehicle Wiring Harness Kit with 4 Pole Trailer Connector (Includes Install Kit) # 119147KIT over the Curt # C59236 because it comes with the circuit tester to help you find the wire functions prior to your trunk lid. I've attached a video of the installation on a 2012 Chevy Volt which has the similar light location so you can see how that may translate to your...
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  • Recommended 4-Way Wiring Harness for 2018 Jeep Wrangler JL
  • The Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118786 is a confirmed fit for your 2018 Jeep Wrangler JL. I recommend this kit over the harness # 119147KIT which will also work, but requires splicing instead of using the factory wiring harness quick connects located behind the driver's and passenger's side tail lights.
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  • Installing Roadmaster Diode Wiring Kit # RM-15267 with Separate Wiring on RV and Towed Vehicle
  • If both your motorhome and towed vehicle have a 3-wire system (separate stop and tail lights), then a converter like the Tow Ready # 118158 should not actually be needed. The converter is only needed if your motorhome has a 2-wire system (combined stop and tail lights) and your towed vehicle has the separate, 3-wire system. I have attached a wiring diagram that shows exactly how the kit should be installed for your specific application, where both the motorhome and vehicle have a separate...
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  • How Does 7-Way and Brake Controller Install in 1973 Ford F-350
  • For a truck as old as yours it would be pretty hard to find a wiring diagram for installing the 7-way part # 20023 but I can help you figure it out using a circuit tester like the part # PTW2993. Basically you are going to need to test all of the wires of your taillights to determine their function and then wire to the 7-way using the included diagram. Now hardwiring in a brake controller will be a similar process but you'll only have to test the wires at the brake switch till you find...
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  • Does Bargman 5th Wheel/Gooseneck # 54701-007-010 Allow Trailer Wiring at Rear to Still Work
  • Yes, the Bargman 5th Wheel/Gooseneck 90-Degree Wiring Harness for Aluminum Truck Bed # 54701-007-010 is a confirmed fit for your 2017 Ford F-350.
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  • Trailer Hitch Recommendation for 2019 Honda CR-V
  • For your 2019 Honda CR-V the etrailer.com hitch # E98848 is a confirmed fit and would work well. It has a 2 inch opening and plenty of capacity and also has a concealed crosstube so it's not as visible. For a no-splice trailer wiring kit that fits your vehicle you'd then want the ZCI Kit part # 119250KIT. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4...
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  • Travel Trailer Battery Charging from the Tow Vehicle 7-Way
  • When your trailer is connected to a 7-way like the Pollak Metal 7-Pole, RV-Style Trailer Socket - Vehicle End # PK12703 the pin at the 1 o'clock position is the 12V power that will charge your trailer battery when it is connected to the corresponding pin on your trailer side connector. This will give your trailer battery a slight maintenance charge that is about 2-4 amps depending on what your alternator can put out that isn't being used by your tow vehicle. This will be like a trickle...
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  • Installing a Brake Controller on a 2015 Ford Transit T250 with Factory Tow Package
  • To the best of our knowledge there is no plug-in adapter that will work on your 2015 Ford Transit T250. There should be a bundle of wires under the driver side dash that you can connect the adapter that you have picture to. Simply cut off the end that doesn't connect to your brake controller and use a circuit tester like part # 40376 to test for the following functions that you can splice your harness to: Blue - Brake Controller Output Black - 12V Power White - Ground Red - COLD Side...
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  • Installing a Brake Controller on a 2018 Jeep JL Wrangler Unlimited with Factory Tow Package
  • While I cannot confirm a brake controller wiring harness for the 2018 Jeep JL Wrangler Unlimited there is still a way to install a brake controller. First you would need a 4-Way wiring harness. We do have trailer wiring harnesses for the 2018 Jeep JL Wrangler Unlimited. For models without the factory tow package Curt has # C56407 and Tekonsha has # 118786. There is a note on the Tekonsha harness though that states it does not currently work with Rubicon or Sahara models. Adding a...
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  • Why Do Some 7-way Plugs Use Dual Contact Surfaces
  • A 7-way (female) vehicle socket like # PK12-707E has a single blade contact; these fit in between the dual contact surfaces in a (male) trailer plug like # 54006-059, # 277-000143 or # A10-7W10 and the connector (type BB) shown in your photo. Some 7-way male plugs will use a single blade contact, such as the plug on Hopkins 7-way extension # HM20049. This item's female socket and male plug happen to both use the single contact. Both types are compatible with each other. The Bargman...
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  • How to Wire 12V Power Supply for 4-Pole Wiring Kit in 2010 Mercedes-Benz GLK-Class
  • All 4-pole wiring harness kits for your 2010 Mercedes-Benz GLK-Class that are shown on the linked page, including the universal no-splice ZCI kit # 119250KIT, need to wire directly to the vehicle's battery. This is to provide protection for your vehicle's internal wiring from shorts and other potential issues on the trailer. Although it is temping to do so for convenience none of the makers of these wiring kits recommend using any type of vehicle internal power outlet since that would...
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  • Recommended Motorhome 7-Way to Towed Vehicle 7-Way Tow Bar Wiring
  • For your 7-way to 7-way motorhome to towed vehicle, I recommend the Bargman 7-Way, RV-Style Connector w/ 8' Long Coiled Cable - Trailer End # 54006-044 along with the Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End # PK12706. This will give you a 7-Way RV Blade to matching 7-Way with a coiled cable to keep it from dragging on the ground.
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  • Parts Needed to Install a Brake Controller and Fully Functioning 7-Way on a Semi
  • Installing the Tekonsha Upgraded Circuit Protected Tail Light ConverterĀ with 4-Way Flat # 119178 and the Hopkins Adapter # 37185 will give you your basic trailer light functions. If you are wanting to have a fully functioning 7-Way then you want to install the part # 119178 and the Universal Wiring Kit # ETBC7 which includes the Hopkins Adapter # 37185 as well as wiring, connectors, and other parts needed for the installation. I have linked a helpful article that you can reference for...
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  • How to Connect Trailer 7-Way to 2017 Toyota Highlander with Factory 4-Way
  • We have just what you need to tow your camper with your new 2017 Toyota Highlander. First, if your Coleman Popup Camper does not have electric brakes and you are only needing to power its rear signal lights, I recommend installing the Tow Ready Adapter Vehicle End # 30717. This will plug right into the 4-Way connector on your Highlander to provide a 7 pole round plug to hook up with your trailer. You will simply tie off the remaining wires from the adapter as they will not be needed...
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  • How to Convert a 4-Way to a 7-Way on a 2017 Ford F-150
  • If you are just needing a 7-Way to activate the lights on your trailer then you will simply need to use the Hopkins # 37185 that you referenced along with a No-Drill Mount Bracket # 18140 as depicted at the start of the attached installation video on a 2011 Ford F-150. For a fully functioning 7-Way that has power to the Brake Controller and 12V Power you will simply need some Deka Jacketed 2 Wire # 10-2-1 and Butt Connectors # DW05745-5. You will want to splice the Blue wire from the...
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  • Adding a 7-Way Trailer Connector on a 2013 BMW X5 to Power Trailer Brakes
  • The easiest way to add a 7-way trailer connector to your 2013 BMW X5 is to start with a 4-way and then convert it to a 7-way. You can either hardwire in a kit, like part # 119190KIT, or use the ZCI kit, part # 119250KIT, instead. The ZCI sensors that clamp to your X5's wiring to detect the current flowing through the wires instead of being spliced in. This way you don't have to cut into the BMW's wiring. I've linked videos of both wiring harness being installed on X5's similar to...
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  • Availability of 16 Gauge Wire for Trailer Lights
  • The Optronics 4-Way Wishbone Trailer Wiring Harness # A25W2GWB that you referenced has 18 gauge wire for the ground and 20 gauge wire for all of the lighting functions. I check with all of the other wishbone harnesses that we have and they all use similar gauge wiring none of which is 16 gauge. For 16 gauge wiring you can use the Deka Bonded 4 Wire # 16-4B-1 which is sold by the foot. I recommend using heat shrink butt connectors like part # DW05744-10 and the Quick-Fix Replacement 4-Way...
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  • Prodigy P3 Brake Controller Installation in 2018 Jeep JL Wrangler without Tow Package
  • Brake controllers like the excellent Prodigy P3 # 90195 use the vehicle brake light switch to deliver the electrical signal that tells the controller your vehicle is braking, and from there the built-in accelerometer sensor determines the amount of braking power that needs to be sent to the trailer's brakes. This is how all proportional type brake controllers operate. They take in the triggering electrical signal from the pedal and then proportionally deliver brake power to match the rate...
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  • Tekonsha ZCI Zero Contact Trailer Wiring Harness Kit 119250KIT
  • You are referring to the Tekonsha ZCI Zero-Contact 4-pole wiring harness kit # 119250KIT which allows installation without having to modify/cut/splice the vehicle's wiring. This is a great option for leased vehicles or cases where you just don't want to start cutting wires! This wiring harness is universal. You can use it on any vehicle that operates on a 12V, negative ground system. Because installation is so simple, you can easily remove the unit and transfer it to another car or truck...
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  • Comparing the Hopkins 7-way part # HM40950 and Pollak Replacement 7-Pole # PK11893
  • The Hopkins 7-way part # HM40950 that you referenced is designed to fit the same mounting bracket as the # PK11893 that you also referenced. I'd go with the part # HM40950 though as it has a 4-way connector below the 7-way.
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  • Hitch and Wiring Harness for 2013 Audi Q5
  • Bolting on an aftermarket hitch like Curt 2-inch hitch # C13136 on your 2013 Audi Q5 will not affect your car's computer but in some instances installing a wiring harness will. Often the effect is simply a code appearing on the dash. We do have both hardwired 4-pole kits like # 119190KIT and # C59236 but we also have the ZCI Zero Contact wiring kit # 119250KIT that requires no cutting or splicing of wires, hence no permanent alterations to the car. Often owners of nicer import vehicles,...
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  • Electric Brake Controller Installation on a 2017 Cutaway Chevrolet 4500 RV
  • We haven't had the chance to install a brake controller on a 2017 Chevy 4500 Cutaway but it's very likely to be the same. The first difference I would be careful of though is the wiring coloring. Before assuming the wire color is all the same use a circuit tester, like part # 40376, to test each wire you find for function. Vehicle manufacturers aren't very consitent on wire colors; especially from year to year. If you need other components, like a trailer hitch or 7-way connector...
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  • Converting a Semi 7-Way Trailer Connector to an RV 7-Way Trailer Connector
  • There are a number of factors involved when converting a semi 7-way to an RV 7-way. Semis generally use a 7-pin round pin socket, similar to # PK11720. And RV style 7-way uses blades, like # PK12706. We do not offer any pre-made adapters to make this conversion that will carry all of the electrical functions required by the RV. Another thing to be aware of is fifth wheel trailers use a combined wiring system where the brake lights and turn signals are on circuit. Your semi connector...
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  • Flat Towing Wiring Kit for 2019 Chevrolet Equinox
  • If you have the 2019 Chevrolet Equinox Premier you can use Roadmaster diode wiring kit # RM-15267 along with 6-pole plug # RM-910030-8 that you will install in place of the included 7-way. An article on wiring is linked to assist you with this process. If you do not have the Premier you'll instead need one of the kits shown on the linked page, such as magnetic light kit # TL21RK or bulb and socket kit # RM-152-LED.
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  • Complete Towing Package for a 2015 Volvo V60
  • Your 2015 Volvo V60 that was manufactured in May of 2015 was before the mid-year harness was developed therefore you will need to use a hardwire option like the Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness part # 119190. The hardwire harness will be the only option that is available for you as the custom fit harness will not work on your vehicle. For a brake controller I recommend the Tekonsha Prodigy P2 Trailer Brake Controller part # 90885. The Prodigy P2 is...
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  • Recommended 7-Way Trailer Connector and Brake Controller for a 2017 Ford Expedition
  • In order to install a 7-way trailer connector on your 2017 Ford Expedition with a factory 4-way trailer connector, you are going to need a 4 to 7-way adapter. If your trailer has a 7-way trailer connector but does not have brakes then you can just use part # 37185. However, if you trailer has a 7-way trailer connector and does have brakes then you will want to use part # ETBC7 instead. This kit comes with the rest of the wires and circuit breakers you will need to setup a brake controller. If...
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  • Recommended Trailer Wiring Harness to Fit 2016 Infiniti QX60
  • The wiring harness that will fit your 2016 Infiniti QX60 depends on if you have tow package or not. If you do not have the tow package you'll need one of the universal hardwire options. I recommend the # 119190KIT. It works on a variety of vehicles, with all sorts of wiring types, and trailers with different types of lights. This will provide you with a 4-way trailer connector. If you need a 7-way you can then use our # ETBC7 kit to convert it. If your Infiniti has the factory...
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  • Trailer Hitch and 7-Way Trailer Connector for a 2015 Mercedes Benz GLA250
  • You certainly can add a hitch and wiring to your 2015 Mercedes GLA250. For a trailer hitch the most popular option is Curt hitch # C13197. This is a Class III hitch with a 2 inch receiver rated for 350 pounds tongue weight and 3,500 pounds gross trailer weight. For wiring in order to add a 7-Way you will first have to install a 4-Way. The only harness available that does NOT require splicing into the vehicle wiring is the ZCI harness # 119250KIT. Then to add a 7-Way you will need #...
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  • How to Install the Hopkins Endurance Multi-Tow 4-Way Flat to 7-Way RV Trailer Adapter # HM47180
  • If you are just needing to make the 4-Way on your 2004 Jeep Liberty compatible with the 7-Way on your trailer (without brakes) then the Hopkins Endurance Multi-Tow 4-Way Flat to 7-Way RV Trailer Adapter # HM47180 is exactly what you need. To install this just simply connect it to your existing 4-Way and then ground the white wire. This gives you the basic lighting functions for your trailer. Should you want to utilize a brake controller or the 12V Power on the 7-Way in the future then...
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  • Adding 5-Way Harness to 2018 Toyota Highlander With 4-Flat
  • I'm a bit confused by your question; the Highlander you are getting has just a 4-pin flat, is that correct? And you are looking to tow a trailer with a 5-flat?
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  • How to Access +12V Power Circuit in 7-Way Wiring to Power Fuel Pump
  • 7-way trailer wiring includes a +12V auxiliary power circuit that can be used for a range of purposes from powering an electric jack to topping off a trailer-mounted battery. This circuit is handled by the contact at the 1:00 position as you look at the vehicle's trailer socket. The ground is at the opposite pin, the one at the 7:00 position. Please refer to the linked photo. For an easy way to access this power circuit to operate your fuel pump you could wire in a 7-way plug like #...
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  • Wiring Harness Recommendation For A 2004 Ford Escape
  • The Upgraded Circuit Protected Tail Light Converter with 4-Pole Flat Trailer Connector part # 119178 is not ran directly to the vehicle's battery. There are 5 wires that you will need to connect in order to install this harness. The white wire is for the ground circuit. The brown wire is for the tail lights. The yellow wire is responsible for the left turn signal. The red wire is responsible for the stop lights and the green wire is for the right turn signal. You will attach each of these...
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  • Parts Needed to Install an Electric Brake Controller on a 2017 BMW X5
  • There isn't a direct plug-in wiring adapter for the Prodigy P2 # 90885 that's confirmed to fit your 2017 BMW X5. But I can help you find what you need to get it installed. You can install a 4-way trailer connector on the back of your X5. Use # 119190KIT for this. It needs to be hardwired into the BMW's wiring. Then use our # ETBC7 kit to convert the 4-way to a 7-way. This kit also includes everything you need to install the P2. However, finding the wiring under the dash for the...
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  • Installing a Towed Vehicle Battery Switched Charging Line on 2016 Ford F53 Chassis Motorhome
  • For your 2016 Coachmen Mirada 35LS, to find a switched power line I recommend using a circuit tester like # 40376. Then you will use the Roadmaster Battery Charge Line Kit for Motorhomes # RM-156-75 with solenoid # TR118665 after the circuit breaker with the center post connected to your switched power line. This with make sure that power is only drawn from the motorhome when the ignition switch of your Coachmen is turned on. Then on the towed vehicle (toad) side you can use the Roadmaster...
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  • 7-Pole To 4-Pole Trailer Connector Adapter To Flat Tow 1997 Suzuki Sidekick
  • From your photos you have a 7-blade connector on the RexAir and a 4 pin round connector on the 1997 Suzuki Sidekick. The blue wire in your photos is a 4 pin to 4 pin connector which will not work to connect the RV and the Suzuki. All you need is a 7-pole to 4-pole adapter part # HM47043 to connect the RV to the Suzuki.
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  • Recommendation for Adding 7-Way Trailer Connector to Hyundai Santa Fe Sport with 4-Way Connection
  • For your adapter from the 4-way to a 7-way, I recommend the Hopkins Adapter 4-Pole to 7-Pole and 4-Pole # 37185. This will give you the option of adding the 12V power, the brake controller output, and the reverse lights. Even if you don't add those functions, you still need to install the white ground wire for proper function. If you want to add those features, I recommend the wiring kit # 5506. The trailer side 7-way will work well with this adapter on your Hyundai Santa Fe Sport....
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  • Wiring the Traditional Trailer 7-Way to 7-Way RV Standard
  • The Mighty Cord 7-Way RV-Style Trailer Connector, # A10-7W8, will have the same wiring configuration as the Hopkins 7-Way Molded Trailer Wire Connector, # H20046. I recommend the Epicord 7-Way Molded Trailer Plug with Junction Box , # 277-000141. The junction box will allow to easily connect your trailer wiring to the new 7-way cord. Using 7 of the Ring Terminal - 12-10 Gauge Wire, # 44-5310A, you can connect your trailer wiring to the junction box. The box can attach to the trailer...
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  • Installing Curt 5th Wheel/Gooseneck Wiring Harness # C56070 on 2017 Ford F-250
  • The Curt 5th Wheel/Gooseneck Custom Wiring Harness # C56070 referenced in your question will plug into the factory US connector on your 2017 Ford F-250 and the extended 7-Way will work perfectly. The issue with regards to fit on your 2017 model, as you alluded to, is the truck's aluminum body which requires some additional mounting hardware. The needed hardware is included with the Curt # C57008 Harness which is why it is the recommended option. What you can do to use the more economical...
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  • Installation of Curt Powered 4-Pole Wiring Harness C59236 on 2017 Chevrolet Bolt EV All-Electric
  • Thank you for your purchase of Draw-Tite Class I hitch # 24956 and Curt 4-pole wiring harness # C59236, both of which are confirmed fits on your 2017 Chevrolet Bolt EV. This wiring harness is a powered/hardwired type that requires a single wire to be run to the battery along with the spliced connections required for the input signals from the car. Routing of that one power wire is often the most challenging part of the installation as it can require some creativity to find a safe and...
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  • Comparison Of Roadmaster And Blue Ox 7-Wire to 6-Wire Coiled Electrical Cord
  • The difference between the # RM-146-7 and # BX88206 coiled 7-wire to 6-wire cord is minor. The Roadmaster cord can be expanded to 8-ft and the Blue Ox expands to 7-ft.
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  • Adapter from Truck with 7-Blade to Camper with 7-Round Connectors
  • An extension is going to be male on one side and female on the other. We have a 4 foot extension, part # TLW6042, that's a 7-way on each end. We don't carry an 8 foot long extension but we do have a 10 foot, part # TLW6510, that should work for you.
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  • Compatibility of Hopkins 40950 Trailer Connector with Tow Ready Pigtail Wiring Harness 20147
  • The Tow Ready Replacement 7-Way Harness and Socket for Factory Tow Package # 20147 is a factory style pigtail that is compatible with the Hopkins Endurance Multi-Tow 7-Way RV and 4-Way Flat Trailer Connector - Vehicle End # HM40950. These factory style connectors are called US Car Connectors and they are absolutely compatible with each other as well as many others. You may also want to consider the Mounting Bracket and Installation Hardware # PK12711U and the Curt No-Drill Bracket for...
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  • Trailer Hitch Recommendation for 2019 Mitsubishi Outlander Sport
  • Yes, the Curt hitch part # C13079 is a confirmed fit for your 2019 Mitsubishi Outlander Sport and would work well as it's a 2 inch hitch with plenty of towing capacity. If you have LED taillights the trailer wiring kit you need is the part # 118538. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8...
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  • Troubleshooting Electric Lockout on Trailer with Surge Coupler
  • Your description of your trailer setup indicates that your surge coupler has an electric lockout feature to allow you to reverse the trailer without the surge brakes engaging. Some surge couplers use a manual lockout but yours has a solenoid with two wires (ground and hot) that take in the truck's reverse light signal; this closes the solenoid so no hydraulic brake fluid pressure can reach your brakes when you back up. Somewhere in your wiring you are losing your connection to the Silverado's...
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  • Parts Needed to Add 7-Way and Brake Controller on 2017 Subaru Outback Wagon
  • In order to install a fully functional 4- and 7-Way connector on your 2017 Subaru Outback Wagon you will need to start with a 4-Way harness if you don't already have one. For this I recommend the Tekonsha T-One Vehicle Wiring Harness # 118467. This custom harness will simply plug into factory ports located in the rear cargo area on the Outback. I have attached an installation video that you can use for reference. Then with the 4-Way installed (or if you already have one on the vehicle)...
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  • Recommended Replacement Electric Brakes for 7,000 lb Tandem Axles
  • For a pair of 7,000 lb tandem axles I recommend the Dexter Nev-R-Adjust Electric Trailer Brake Kit # 23-464-465. These brakes are 12" diameter x 2" wide and will work with your 5 bolt mounting flange and 16" wheels. These brake assemblies are rated specifically for use with 7,000 lb axles instead of some brakes which can work with axles that have a wide range of capacity, such as between 5,200 lbs and 7,000 lbs. The only thing you need in addition to these brakes is Mounting Bolts...
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  • How to Change Out 4-Way at Rear of Motorhome to Work with 7-Way on Trailer
  • Thank you for the pictures! What you may be able to do is install the Hopkins # HM47210 on your motorhome to replace your current 4-Way round connector. I'm guessing the 2 wires for your brake controller system are for 12V power and for the brake controller signal. If this is the case then you will need to connect the following functions on your motorhome wiring with the following wires from the Hopkins connector: White - Ground Yellow - Left Stop/Turn Green - Right Stop/Turn Brown...
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  • Recommended Trailer Wiring Harness for 2015 Mercedes-Benz GLK-Class
  • The trailer wiring harness I recommend going with for your 2015 Mercedes-Benz GLK-Class is the Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness with Install Kit # 119190KIT because it is designed to protect your car from any shorts with a self-reset. I've added a link to a video review of this kit for you to take a look at.
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  • Troubleshooting 7-Way Trailer Connection Wiring on 2017 Nissan Frontier
  • In your 2017 Nissan Frontier, the Curt brake controller should be installed using the custom wiring adapter # C51382. This should work correctly to give you the proper wiring within your cab. Then you will use the Curt # C56226 or the Tekonsha # 118266 to get the correct 7-way. If you have done this even using the previous relays, check your trailer connection for functions using the attached photo and a circuit tester like # PTW2993. It sounds like the trailer may be mis-wired...
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  • Parts Needed to Convert 4-way of 2015 Toyota Highlander to 7-Way
  • If your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller. This kit comes with everything needed to wire up the 7-way and install a brake controller. For a brake controller I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling brake controller because of how well it works and how...
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  • Dual 4-Way Flat Connector Adapter With Two Male Ends for Flat Towing
  • We have the exact part you need with the Roadmaster Extension Loop for Towed Vehicles - Dual 4-Way Flat Trailer Ends # RM-300150-00. This has two male connectors for you to plug into the harness on your Jeep Wrangler and on your RV. I have added a link to a video review of this adapter to check out as well.
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  • How to Access Wiring for 2009 Lexus RX 350
  • If you have the factory tow package then you can access that port behind the drivers side in the hatch of your 2009 Lexus RX 350 to install 4-way harness # 18002. Harnesses # C55563 and # 118478 can still be used, and will provide higher current with protection for the car's wiring I've added a link to a video review of this part being installed on an '07 RX 350 for you to check out which will be the same as your '09.
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  • What Does Some Trailer Wiring Have 2 Brown Tail Light Wires
  • Common 4-pole trailer wiring like # HM38138 uses one wire, the brown one, for the running lights on both sides of the trailer. Sometimes what is called a 'wishbone' harness is installed on the trailer and this simply uses two separate running light wires - brown with yellow for left and brown with green for right - to make it easier to connect to the trailer lights since that way no jumper wire will be needed to cross from one side to the other. Some examples of wishbone style 4-pole...
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  • Replacement 5-Way Trailer Wiring for Boat Trailer
  • For new 5-way wiring what you'll need is the part # A40W5B. This will handle all of the wiring that runs from the connector back to the lighting assemblies as well as for a reverse lock out solenoid. Surge brakes don't always require wiring as they don't always have reverse lock out solenoids. It's very possible yours does not have one so wiring may not be needed. If you see a solenoid at the back of the actuator on the brake line you will want to run the blue wire of the 5-way to it. I...
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  • Troubleshooting Constant Power on Drivers Side Tail Light of Trailer Connector
  • It sounds like you have a crossed wire after the fuse panel. Sometimes this happens inside the trailer connector, so I recommend removing your trailer connector and using a circuit tester like # PTW2993 to test each of the wire functions at the US Car Connection locations like you see on this harness # 20147. If this connection works correctly then you will want to replace the 7-way connector on your vehicle because it has an internal issue. If this is the case, I recommend the Hopkins...
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  • Adding a 7-Way Trailer Connector to a 212 Subaru Outback and How to Charge Trailer Battery
  • I do have a video that will be very helpful when installing a 7-Way connector on your 2012 Subaru Outback. I have linked that video for you. But not all parts of the video will apply to your situation simply because of the type of brake controller you are using. So you can just ignore those parts. You will need # ETBC7 which comes with the 7-Way and the wiring and other accessories you will need. The installation is not difficult and if you have even a little experience with automotive...
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  • Vehicle Side 7-Way Round Pin Connector for a 2015 Nissan Frontier
  • If you only need the vehicle side 7-Way round pin connector and already have all the wiring to attach to it on your tow vehicle you can use connector # PK11720. If you do not have the wiring already available on your 2015 Nissan Frontier then you will need a few parts. If the truck did not come with any kind of trailer connector you will need to start by adding # 118525. You will cut off the 4-Way end and attach the wires to the back of the new 7-Way round pin, see diagram. If the trailer...
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  • Parts Needed to Install 7-Way on 2016 Ford F-150 with 4-Way
  • For your 2016 Ford F-150 if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # 37185 and the install harness part # 22292. If you check out the install video I attached you will see how the connections would be made. For a brake controller I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling brake controller because of how well...
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  • Brake Controller Installation on a 2007 Ford Expedition with Factory 4-Way Wiring Harness
  • In order to install a brake controller on your 2007 Ford Expedition you will want to use the Adapter 4-Pole to 7-Pole and 4-Pole part # 37185 as this will give you both 4 and 7 way connection points on the rear of your vehicle. The rest of the wires needed to install a brake controller should already be present. When you do decide to purchase a brake controller, I recommend using the Tekonsha Prodigy P2 Trailer Brake Controller part # 90885 as this is one of our most popular and best...
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  • No Brake Light Function from Hopkins Tail Light Converter Kit HM48895
  • The Hopkins 4-pole wiring harness made for your 1996 Nissan Pickup is kit # HM43505 which appears on the linked page along with similar items # 118353 from Tekonsha and # C55353 from Curt. All of these wiring kits use custom-fit plugs for simple installation at the truck's taillight connectors. No splicing is required for these custom kits. The Hopkins hardwired harness # HM48895 is made for newer vehicles that use LED lights. This item has a red wire that splices to a vehicle's brake...
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  • Availability of Brake Controller Harness for 2018 Jeep JL Wrangler Unlimited
  • I spoke with my contact at Tekonsha regarding your 2018 Jeep JL Wrangler Unlimited. At this time, there is not currently a Plug-In Brake Controller Harness available for this model Jeep. He was not sure if the JL model is even equipped with a factory port that a plug-in harness would connect to. You can check beneath the dash of your Jeep to see if one is present. Your only option right now will be to simply hardwire a brake controller to your Jeep. If you do not already have a...
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  • Can the Hopkins # HM47425 and Bargman # 50-67-210 be Used to Replace Adapter Cable
  • Although we do not carry that exact cable, as you mentioned, the parts that you mentioned would be a great way to replace your cable. The Hopkins Trailer Connector Adapter # HM47425 would change the 7-Way round connection on your truck to a 7-Way blade style. You can then use the Bargman 7-Way Molded Trailer Wire Connector # 50-67-210 to connect the Hopkins adapter to your trailer. Since both ends will be the female, or plug, ends then this combination will work.
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  • Connecting Ram with 7-Way Blade Connector to 5th Wheel Trailer with 7-Way Female Round Pin Connector
  • It looks like your Ram is equipped with a standard 7-Way female blade style connector but your trailer has a 7-Way round pin connector, specifically the female end which is usually on the tow vehicle side. Because of this unorthodox setup there isn't a single cable available that will connect the trailer to your Ram but we do have the pieces needed to do this. In order to connect your Ram to the trailer you can use a 7-Way loop like the Bargman # 50-67-210 and then an adapter like the...
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  • Adding 7-Way and 4-Way to 2017 Toyota Tacoma Without Tow Package
  • The reason the 7-Pole and 4-Pole Trailer Connector Sockets # HM40975-11998 has more wires than the 4-pin is because this part is used for a 7-way and 4-way. We can help accomplish your goal but first you would first need to add 4-way # 118685. From there you will need # 5506, which is similar to the # ETBC7, to get the functions of the 7-way and you can then hardwire # HM40975-11998 to get the look you want. There is no video for how to accomplish specifically what you want to do, so...
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  • Wiring & Electrical Requirements for 2010 Crossroads Cruiser 30SK 5th Wheel
  • 5th wheel RVs typically use a 7-way type wiring set-up, with a trailer plug that looks like # H20046. This mates to a 7-way vehicle socket like # 37185. The linked photo will give you a good view of a vehicle-side socket and the function carried on each of its electrical circuits. The 7-way plug and cable should already be installed and ready for use with your tow vehicle's 7-way. I have linked for you our main page for RV electrical products including 50-amp cords, extensions and inlets....
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  • Ways to Install New 4-Pole Trailer Connector
  • Four flat trailer wiring, also called 4-pole wiring, uses four wires and pins configured as shown in the linked photo of a trailer side 4-pole connector. The one pin that is different from the other three (on both trailer and vehicle side connectors) will be the ground pin and this usually has a WHITE wire that will ground to a clean bare metal spot the trailer frame with a ring terminal. The next pin is for the running light circuit and this typically uses a brown wire to activate...
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  • Bypassing the Factory 7-Way on a 2006 Lexus LX 470 with an Aftermarket 7-Way
  • If you are wanting to bypass the wiring on your 2006 Lexus LX 470 then I recommend installing the Tekonsha Upgraded Modulite Vehicle Wiring Harness Kit # 119147KIT for a 4-Way flat and then installing the Universal Wiring Kit # ETBC7 for a fully functioning 7-Way. The Tekonsha kit will hardwire into your tail lights and you will use the included circuit tester to connect each wire to the proper function. You will then need to run the Black lead wire up to battery so that the trailer...
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  • No Power at 12 Volt Pin In 7-Way on a 2008 Toyota Tundra
  • The first step I would take would be to check the 30 amp trailer brake controller fuse which is located in the # 10 slot on the fuse box under the hood of your 2008 Toyota Tundra. If the fuse is still intact then you will want to move to the 7-way trailer connector. Using a circuit tester like part # 40376, check the black wire on the back of the 7-way way while the vehicle is running. If you are getting power here then the problem is in the trailer connector and it will need to be replaced...
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  • 2017 Nissan Armada SV Trailer Wiring Recommendation
  • Since your 2017 Nissan Armada does not have trailer wiring currently what you'll need is a hardwire style 4-way kit tested as a fit for your vehicle like the Tekonsha part # 119147KIT. This taps into the taillight circuits of your vehicle to give you the 7-way you need. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a...
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  • Recommended Trailer Hitch, 4-Way, and 6-Way Wiring for 2018 Toyota Sienna
  • For your 2018 Toyota Sienna I do recommend installing a 4-Way harness and then going with a 4-Way to 6-Way adapter for when it's time to tow the pop-up camper. This will be the easiest and most reliable method for your vehicle. As you mentioned in your question your Sienna has a separate wiring system, which means the brake and turn signals are sent along separate wires. Because of this a powered converter is needed to not only safeguard the vehicle's wiring and provide enough power...
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  • Is the Yellow Wire For the Reverse Lights On the 7-Way Molded Trailer Wire Connector H20043
  • In regards to the 7-Way Molded Trailer Wire Connector part # H20043, the yellow wire is for the reverse light circuit yes. This should then align with the pin responsible for the reverse light circuit on your vehicle. The terminology used for "AUX" is the same as the reverse light circuit. Please note, if you are rewiring a trailer I highly recommend you use a junction box, the Trailer Wiring Junction Box part # 3375601101 to keep everything organized. We also have the Trailer Wiring...
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  • How Long is the 8 Foot Cord # 54006-044 when Coiled Not Stretched?
  • The Bargman 7-Way, RV-Style Connector w/ 8' Long Coiled Cable - Trailer End # 54006-044 is 13 inches at the coil then 10 inches at the connector and 7 inches at the pigtail. We also have the coiled 6 foot # WG54006-043 and the coiled 12 foot # WG54006-046 which will only be longer or shorter in the coiled section.
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  • Recommendation for Wiring to Allow Backing Up With Electric Lockout Solenoid on Surge Brake Trailer
  • For your electric lockout solenoid on your trailer, I don't recommend using the parking lights as your signal. Although this works for daytime without issue, at night you will lose all of your trailer braking. Instead, I recommend you use the Deka Heat Shrink Butt Connectors # DW05744-5 and the Hopkins Endurance 5-Way Flat Trailer Wiring Kit - Vehicle and Trailer Ends # HM47890. This will give you a clean connection between your trailer and vehicle and allow you to properly connect...
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  • Available 10-Foot Trailer-Side 7-Way Plug
  • We do have molded trailer-side 7-way plugs in several lengths. For a 10-foot you can use part # 50-67-005. If you prefer a 10-foot that includes a junction box for connecting your trailer wiring you can instead use part # 277-000141. If you need ring terminals you can use # 44-5310A.
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  • Installing 7-Way Connector on 2007 Ford Expedition with Factory 4-Way
  • Since your 2007 Ford Expedition has the factory 4-Way connector at the rear of the vehicle, you will just need to install the Hopkins Adapter 4-Pole to 7-Pole # 37185 to complete the wiring and install a fully functional 7-Way. Vehicle manufacturers will often change the wire colors on their factory trailer wiring, as appears to be the case on your Expedition. Because of this, I highly recommend testing the wires on your vehicle with a circuit tester like # PTW2993 in order to determine...
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  • Does the Upgraded Heavy Duty ModuLite # 119190KIT Require Programming on a 2013 BMW X5
  • The Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness part # 119190KIT which is a fit for your 2013 BMW X5 will not require any expensive programing from the dealer in order to function properly. Once you splice into the correct wires all you will need to do is run the power/ground wire and you are good to go which you can see from the attached install video. In regards to the Draw-Tite Max-Frame Trailer Hitch Receiver part # 75600, the plastic push rivets that are...
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  • Finding Reverse Light Circuit When Installing 4-Way to 5-Way Adapter on Vehicle
  • When connecting to the reverse light circuit of a vehicle for a 5-way adapter like the part # 20036 you want to use a circuit tester like part # PTW2993 to test the wires that run to the reverse light circuit till you find the one that has voltage when the reverse light is on. That's the power circuit to use for the 5th pin of the adapter. I don't have a way to look up what color the wire would be on your truck but using the tester will lead you to the correct circuit.
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  • Installation of Tekonsha Wiring Harness 118675 Power Wire for 2017 VW Tiguan
  • It is not recommended to use a different power supply for the Tekonsha Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness # 119190KIT. The 12V power wire is designed to be run directly from the battery to ensure correct voltage and correct amperage while avoiding the vehicle fuses and relays. Although it is possible that rear power supply could work, it has not been tested for that application so it is not recommended. For your 2017 VW Tiguan, I recommend using the...
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  • Trailer Taillights Stay On After Trailer Wiring Harness Install
  • I am not sure if you are saying that the trailer's taillights are staying on or the vehicle's taillights are staying on but if it is the vehicle's then you would need to take the vehicle to a service center. However, if you are referring to the trailer's taillights staying on then I would need to know if you are using a hardwire trailer wiring harness or a plug-in trailer wiring harness. If you are using a hardwire trailer wiring harness like the Upgraded Modulite Vehicle Wiring Harness...
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  • How To Convert a Euro 13-Pin to a US 5-Way Trailer Connector
  • If the trailer has reverse lights then you will want to use the Modulite Protector 5-Way Flat part # 119177 instead of the Upgraded Tail Light Converter part # 119130 on your 2011 Volkswagen Jetta. Then in order to make an adapter that attaches the Euro 13-Pin connector on your trailer to the US 5-Way connector on your vehicle you will need the following: Hopkins Wiring Harness with 5-Pole part # HM37918 Curt 2-To-3-Wire Tail Light Converter part # C56196 Vehicle Side Euro 13-Pin Connector...
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  • How to Connect Auxiliary Battery to Popup Camper 7-Way for Off Grid Camping
  • If you were wanting to just plug in your current 7-Way on your popup to a 7-Way that is connected to your auxiliary battery then you could install the Hopkins # HM47210 on your trailer. Then you would need to ground the white wire to a clean, bare-metal surface on your trailer and run some 10 Gauge Wire # 10-1-1 from the Red wire on this connector to your battery. Even though this would work it wouldn't be as clean as just hardwiring your battery into the 12V Power circuit on your trailer....
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  • Adapter for Truck Wiring To Wire Third Brake Light of Camper Shell
  • What you can do is use the converter box part # 118158 wired to either you taillight wiring or trailer wiring and you'll have a dedicated stoplight circuit on the red wire. If you ground the white wire and then run the green wire to the right turn circuit and the yellow to the left turn on the input side of the box the red wire on the output side of the box will have just the stoplight.
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  • Available Vehicle and Trailer Wiring Connectors
  • I cannot recommend custom-fit trailer wiring for your vehicles without knowing their year, make, model and version but I can help you with basic 4-pole type connectors for both the vehicle and trailer. I linked pages for both types of connectors. For a trailer side 4-pole you can wire in to your trailer we have items like # W787274 and # 54000-026. For a vehicle side 4-pole we have # 18252 and # C58345 which includes a bracket. For a bracket only use # 18144. I also linked a helpful...
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