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Expert Answers about Wiring


  • 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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  • 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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  • 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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  • 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 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • Adapter Recommendation for Going from 7-Way Round to Flat
  • There is no taillight converter installed in the Adapter part # HM47425 that you referenced so if you need to go from separate to combined lights then this kit is not for you. You will need to add a converter, like the Tow Ready, # 119130. Just cut off the 4 way end and wire it into this adapter. I have attached a picture which illustrates this.
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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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  • 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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  • 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 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 Curt T-Connector # C56403. This will install by simply plugging into factory ports located inside the rear cargo area of the vehicle. Once the connections are made, you will just...
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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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  • 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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  • What is the Wire Gauge on 10 Inch Electric Trailer Brake Magnets
  • The magnet wires on Electric Trailer Brake Assembly # A35W42B are 18 gauge. The wiring going to the brakes from a trailer connector is usually larger such as 10 gauge # 10-2-1.
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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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  • 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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  • 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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  • 7-Way Extension for Towing Food Truck with 2003 Ford Expedition
  • Thanks for the picture of the trailer wiring connector you have. Based on that you are in need of a 7-way blade extension like the part # C56080 for a 7 foot long extension or part # HM20049 for an 8 foot long extension. Or if you are looking for something shorter you'd want the part # TLW6024 which is 24 inches long.
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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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  • 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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  • 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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  • 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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  • Troubleshooting RV Electric Brakes That Do Not Engage
  • Since you have tried your truck with another RV trailer and found that trailer's brakes worked fine with your truck and its brake controller this suggests the problem is on the trailer side. There is a simple test you can do on your trailer's brakes that needs only a well-charged battery, such as the one in your truck. If you connect wires to the battery and directly apply their other ends to the brake and ground contacts on the trailer's 7-way (see photo please) all brakes on the trailer...
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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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  • 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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  • 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 # 40376 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 12V...
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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 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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  • Parts Needed to Add 7-Way to 1968 Chevy Truck
  • To add a 7-way to your 1968 Chevy K-10 truck you will need to start with a 4-way, and the right kit for your truck is the 4-Pole Hardwire Kit with Circuit Tester # 18252. You will then need the Universal Installation Kit for Trailer Brake Controller # ETBC7, which will give you a 4-way to 7-way connector, circuit breakers and the rest of the hardware needed to install a brake controller. For a brake controller I recommend the Draw-Tite I-Command # 5535 with Harness # 20127 because it...
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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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  • 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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  • 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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  • 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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  • 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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  • Combined to Separate Wiring Converter Compatible with LED Lighting to Add 3rd Brake Light to Trailer
  • As a matter of fact we do. The Curt 2-to-3 converter, part # C56196, works with LED lights. I've linked a review video for you to take a look at.
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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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  • Can the Custer Trailer Connector Adapter # F77R be Used to Tow a 5th Wheel with a Kenworth Truck
  • The Custer Trailer Connector Adapter # F77R is meant to go from a trailer with a 7-Pole Round connector to a 7-Way Blade connector. I believe that you need the exact opposite which can be found with the Pollak # PK12-724. You will need to take note to see if your 7-Way on your Kenworth has separate taillight wiring or not. If you test the pins on your 7-Way Round with a circuit tester # PTW2992 and find that the stop light signal has its own pin then you will need to splice in a converter...
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  • How to Make 7-Way Blade to 7-Way Round Adapter for Tractor Trailer to Use Curt Echo
  • Your heavy duty style 7-way is different than the 7-ways we normally see for two reasons. One reason is that the stop lights and the turn signals are on different circuits and because the 7-way uses round pins instead of flat blade style connectors. On the chart that you attached you don't have a dedicated brake output signal (probably because your vehicle normally tows air brake trailers) but you do have an extra NA circuit that you could use a brake controller with. To use the Curt...
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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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  • Parts Needed to Install a Brake Controller and Fully Functioning 7-Way on a Semi
  • Installing the Tekonsha Upgraded Circuit Protected Tail Light Converter 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • Wiring Lance Slide In Camper to Work with In-Bed Trailer Connector on 2019 ford F250
  • Since the 7-way round pin plug is obsolete, your best bet would be to replace the connector on your camper with the common 7-way blade style connector. You'd remove the existing plug on your slide in camper, and replace it with # 54-77-003. You could then use an extension like # C56080 to reach the connector rearward of the wheel well.
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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 Fifth Wheel Wiring Connection for 2019 Ford F-350 Super Duty
  • You are correct, there are two Bargman 5th wheel wiring harnesses for a 2019 Ford F-350, and the correct harness will depend on if you have the Fifth Wheel Towing Package in your truck. The fifth wheel towing package means your truck has the puck system for mounting a fifth wheel hitch like the B&W Companion 5th-Wheel Hitch for Ford Super Duty Prep Package # BWRVK3300. The Bargman 5th Wheel/Gooseneck 90-Degree Wiring Harness # 54701-007-010 is the recommended harness if your 2019 Ford...
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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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  • 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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  • 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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  • 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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  • Troubleshooting Trailer Brakes Where Only One Assembly Locks Up
  • The brake assemblies all will receive the same amount of power from your brake controller so the issue is the brake assembly that is locking up. Most likely it's adjusted tighter than the others which is causing it to lock up sooner. That would be the first thing I'd check. The trailer wheels should be able to turn by hand if they are off the ground but you should be able to hear the brakes drag on the drum slightly. Check to see if the one that locks up is harder to turn and that would...
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  • Correct Pin Out for Truck and Trailer 7-Way Blade Connectors
  • Attached are some photos of the typical wiring functions for truck and trailer 7-Way blade connectors, like parts # PK11893 and # PK12706. If you typical pull a trailer that has a 7-Way connector then you want to follow the pin out diagrams I mentioned. If the chippers that you tow have a different configuration then the Hopkins Adapter # HM47535 will likely do the trick because you can change it so that the center pin is either related to the electric brakes or the 12V power. If you...
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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 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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  • 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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  • 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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  • Wiring Third Brake Light for Truck Topper on 2012 GMC Sierra
  • Unfortunately, your photo didn't come through, but we get asked this question fairly often. There is a bundle of wires under the brake pedal of your 2012 GMC Sierra that will have an orange wire that should be used to power the third brake light of the camper shell. This orange wire is in the same bundle as the brake controller wires in the photo attached. If you want to capture the signal at your tail lights then you will use the Curt Vehicle to Vehicle Converter # C56196 to separate...
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  • Does Universal 7-Way Wiring Harness Work on 2013 Toyota RAV4
  • Yes, the Universal Wiring Harness w/ ModuLite and Brake Controller Harness - 7-Way Trailer Connector # 22550 will work on your 2013 Toyota RAV4, although your mechanic is correct that because it is a universal kit it will be more difficult than the other option available. For an easier install I recommend starting with the T-One Vehicle Wiring Harness with 4-Pole Flat # 118578, which - unlike the universal 7-way - does not require splicing into your Toyota's wiring, just plugging into...
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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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  • 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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  • 7-Way Adapter Recommendation to Go From Semi Truck 7-Way to RV 7-Way
  • The part # PK12-724 is designed to plug into a 7-way round connector like what your semi-truck has and provide you with a 7-way blade type connector for your RV 7-way.
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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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  • 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 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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  • No Brake and Turn Signals On Boat Trailer with 5-Way to 7-Way Adapter
  • For starters, have you tested the pins inside the 7-way trailer connector on the vehicle to make sure these circuits are active? If not I would do just that but the Adapter 7-Pole to 4-Pole and 5-Pole part # 37385 will only work for you if both the vehicle and trailer are wired the exact same way. I have attached the standard(ish) trailer wiring diagram for you. If I had to guess, I would say that the vehicle side is correct but the trailer side does not match this. Therefore, I recommend...
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  • Can Modulite be Installed to Protect TIPM on a 2006 Dodge Ram 3500
  • The best way to avoid having to deal with issues from the TIPM on your 2006 Dodge Ram 3500 would be to install a new wiring system that bypasses it. This will ensure that the TIPM will not go out on you since the wiring won't be run through it. All of our modulite boxes come with wiring so that they are ready to be installed which makes new wiring the best route to go. You can install the Tekonsha Upgraded Circuit Protected Tail Light Converter Hardwire Kit # 119178KIT for starters which...
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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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  • Troubleshooting Bent Pin on Trailer Side 7-Way Connector
  • It does look like one of the pins on your existing 7-Way may have been bent back into the connector. This isn't too uncommon and it would definitely cause the intermittent connection issues you have been having. If you aren't able to bend back the pin in question so that it can make good contact with the vehicle-side connector then your best option is indeed to simply replace the 7-Way. For this the Pollak # PK12706 will work well. You will just need to cut off your existing connector...
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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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  • Recommended Trailer Wiring Harness for a 1998 Ford E-350 Ambulance
  • The only type of trailer wiring harness we have that will work for your 1998 Ford E-350 with a service body is a universal one like the Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness part # 119190KIT. This kit will require you to cut and splice into the factory wires on your vehicle but there is no way around this as they do not make a plug-in kit for the service body models. This kit comes with a circuit tester so you can find the correct wires and all of the other...
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  • 7-Way Trailer Wiring Configuration
  • If either your vehicle or trailer 7-way wiring does not have all wires connected to activate all of the 6 possible circuits you can make that last connection to activate it. On the trailer side it is really easy to install a new full-functioning 7-way plug by adding a junction box like Epicord # 277-000141. This junction box includes a pre-wired 7-way trailer plug, like the one shown in the linked photo which is wired to the RV standard. By installing this box on the trailer you...
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  • Installing 5th Wheel Wiring Harness in 2018 Ram 2500 Short Bed with Factory Drop-In Bed Liner
  • For your 2018 Ram 2500 short bed, I recommend the Bargman 5th Wheel/Gooseneck 90-Degree Wiring Harness - 7' Long # 54701-003 or Curt # C56070. This will allow you to install the plug anywhere you desire. Many people will install it near the tailgate on the driver's side. The drop-in bed liner doesn't add any issue to the install other than another layer to drill your hole through and using longer screws to mount.
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  • Difference Between Tow Ready # 20142 and Curt # C57003 Adapters with Lamp-Out Sensors
  • If you will be towing a trailer with LED lights then you will likely need to use an adapter with a lamp-out sensor like the Tow Ready # 20142 or Curt # C57003 that you referenced. Both of these adapters will accomplish the same task; plugging into an existing 7-Way on your Audi and providing a new 7-Way that is able to recognize the LED trailer lights. The only difference between the two items is the bracket/housing and the wire extension on the Curt # C57003. If you don't need this and...
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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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  • 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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  • Will 7-Way Connector Charge Auxiliary Trailer Battery
  • The yellow wire on the Hopkins 7-Way RV Style Connector with Molded Cable # H20046 will not be able to charge an on-board battery, it should really be used for reverse lights. To charge the auxiliary battery on your trailer the best option is to use a battery charger such as the CTEK MULTI US 3300 12-Volt Universal Battery Charger # CTEK56353 which you would plug into a standard outlet. You can maintain that charge when driving by running # 10-1-1 wire along with 40 amp circuit breaker...
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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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  • 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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  • Recommendation For Converting A 13 Way European Plug To US 4-Way Flat
  • For your European lighting connection on your bike rack, I recommend you use a few adapters for the easiest connection. If you can get a 13 pin to 7 pin European connector (which we don't carry) then you can use the Trailer Connector Adapter for Land Rover - 7-Way, Round Pin, European Style to 4-Way Flat # 118710 and you wouldn't need to do any splicing. If not, then you will need to divide out the functions to convert to your US 4-way flat. The Vehicle to Vehicle Tail Light Converter...
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  • Replacement 7-Way Trailer Wiring Harness for 2011 Chevy Silverado 2500HD
  • If you are referring to the actual wiring then you will want to use Pollak Wiring Harness part # PK11-934. This harness will require you to cut and splice but it would be the only option we have for you as we do not carry OEM parts. However, if you are referring to just the connector then you can use the Twist-in 7-Pole, RV-Style Trailer Connector part # PK11916 which install in the same position and way as the factory 7-way trailer connector on your 2011 Chevrolet Silverado 2500HD. I...
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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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  • 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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  • 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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  • 7-Way Round to 6-Way Round Adapter Recommendation
  • Sounds like you are looking for an adapter like the part # HM47445 which will go from a 7-way round on a tow vehicle to a 6-way round on a trailer. I attached a review video for more info on this as well. The adapter you referenced is for a 6-way round to a 7-way blade.
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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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  • 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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  • Installing 12V Power On Ford F-150 7-Way Trailer Connector
  • You do not need to connect the 12V power connection on your F-150 7-way. That power is only required if you want to charge a trailer battery while towing or if you are using an electric device on your trailer like a powered sway control or wireless brake controller. It is likely that a fuse or relay needs replaced for the factory function if it was recently interrupted. I recommend checking your owner's manual for fuses and relays associated with this function. If you want to add that...
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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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  • 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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  • 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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  • 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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