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Expert Answers about Wiring


  • 7-Way Trailer Plug Adapter or Compatibility with Lance Slide-In Truck Bed Camper
  • Lance does have a proprietary plug, but many customers see a standard 6-way or 7-way round and notice it doesn't fit their factory 7-way as well. I've attached an article to help if you have one of the 7-way or 6-way round connectors which we do have adapters for. If you have a 7-way round, then you will use adapter # 47595. If you have a 6-way plug then you will use adapter # A10-7276VP or # PK12728. If you have the special Lance plug, I recommend replacing it with # 54-77-003 which...
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  • Re-Wiring Trailer for Tail Lights and Electric Brakes
  • To completely rewire your trailer I recommend using the Trailer Wiring Kit # e99011. This includes a 7-Way connector, a junction box to provide you with a clean setup, and all the necessary hardware. You will then just need additional 16 gauge wiring # 16-4B-1 for the light circuits and 10 gauge wiring # 10-1-1 for the brake and 12V power wires, both of which are sold by the foot. I have attached a great install video along with a standard trailer wiring diagram that you can use for...
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  • Is My 2016 Honda Pilot Trailer Wiring 7-way or Only 4-way?
  • Your 2016 Honda Pilot will have a trailer wiring plug behind the driver's side at the rear by your tail lights. I've attached a video of the Curt # C56291 harness to assist. The Curt wiring harness # CU86FR is the 7-way wiring harness that connects to the same location. Each kit activates the tow package already available in your vehicle, so I recommend installing the 7-way unless you know you will only ever use the 4-way. It is a little more work on the installation side but gives you...
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  • Fifth Wheel Wiring Harness Recommendation for 2020 Ford F-350 Super Duty With Prep Package
  • The recommended fifth wheel/gooseneck wiring harness for your 2020 Ford F-350 Super Duty with the factory prep package is the Bargman 5th Wheel/Gooseneck 90-Degree Wiring Harness for Aluminum Truck Bed # 54701-007-010. The reason for that is when I have contacted Bargman about this issue in the past, they told me that while the other harness, part # 50-97-410-010, will work with a Ford F-350 with the fifth wheel prep package, there have been very, very rare occasions where it can read...
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  • 7-Way Upgrade Kit to Install Curt Echo Brake Controller and Provide 12V Power for Trailer Battery
  • If you have a 4-pole wiring setup now and you want to install a wireless trailer brake controller you will use an adapter like Curt # C57672 or Hopkins # 37185. Both install by plugging in to your 4-pole and by making additional wiring connections using the pigtail leads. If you want to use a wireless smartphone-controlled brake controller like the Curt Echo # C51180 you will not need to run a blue brake output wire. All you'll need to do is provide a 12V power connection to the adapter....
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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 the Brake Output Wire Get Attached to a 12 Volt Trailer Battery
  • In order to rewire your trailer, I strongly recommend you use the Trailer Wiring 7-Way Upgrade Kit part # e99011 with the Bonded 4 Wire part # 16-4B-1. This is going to ensure you have all the correct wire gauge and the junction box makes for a clean install as well as an easy way to troubleshoot if you ever have issues. In regards to the brake output wire part # 10-1-1, this will receive power from the tow vehicle's brake controller via the 7-way, not a battery during normal braking. However,...
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  • Does Installation of Trailer Wiring Harness on 2020 Toyota Highlander Void Vehicle Warranty
  • Good question, and the installation of any aftermarket parts such as a trailer wiring harness will not void the warranty on your 2020 Toyota Highlander Hybrid, or any other vehicle. The reason for that is because you are protected by what is called the Federal Magnusson-Moss Warranty Act. This act says if something breaks on your vehicle and you take it in for warranty repair, the dealer must honor your warranty unless whatever you have added to your vehicle or its installation actually...
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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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  • 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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  • How to Rewire Vintage Trailer with 7-Way Connector and Parts Needed
  • Most of us aren't electricians, but that doesn't mean wiring a trailer is beyond us. It will take a little bit of time, but I wouldn't consider it a difficult DIY project by any means. So, to wire your 1977 Serro Scotty vintage camper, I recommend using the following parts: - Mighty Cord 7-Way RV-Style Trailer Connector # A10-7W6 (6 ft long) - this is a high quality molded trailer connector with corrosion resistant terminals. - etrailer Trailer Wiring Junction Box - 7 Terminal # e99009 ...
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  • Redarc Tow-Pro Elite vs. Curt Spectrum Brake Controller for 2019 Audi Q5
  • On the surface, there is a lot of similarities between the Curt Spectrum Trailer Brake Controller # C51170 and the Redarc Tow-Pro Elite Trailer Brake Controller # 331-EBRH-ACCV2, but the Redarc is truly the superior option in every way for your 2019 Audi Q5. Since you don't have trailer wiring in your Audi you will need to add Vehicle Wiring Harness # 119190KIT and Universal Installation Kit for Trailer Brake Controller # ETBC7, though the Spectrum also needs the Wiring Adapter for Curt...
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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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  • 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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  • 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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  • 4-Way Flat to 4-Way Round Trailer Plug Wiring
  • It may seem odd to clarify, but we sometimes have customers describe things differently than we may. So if you are looking for the connector between a 4-way flat on your vehicle and the 4-way round connector a towed vehicle would plug into you simply would need the Custer Trailer Connector Adapter - 4-Way Round to 4-Way Flat # ADP001. If you needed a longer connector you can use # Adapter 4 Round to 4 Flat # 47465. If you are looking for a long trailer wiring umbilical cord, you would...
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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 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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  • How to Power Small 12V Air Compressor Using Trailer Connector
  • We do indeed have an adapter that will convert your 7-way to a 12V power outlet. You'll need part # PK11896. Or if you'd prefer something a bit more permanent, you could install something like # DG6112VP in the inside wall of the truck bed and simply tap it into that 12 volt feed to the trailer connector.
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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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  • 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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  • 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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  • Installing a Trailer Battery Charge Line from Vehicle Trailer Connector
  • To charge your trailer battery when you look at the 7-way trailer-side connector the 11 o'clock pin will mate up to your 12V signal from your vehicle. With most trailer connectors like # H20043 this will be the black wire. That black wire simply connects using 10 gauge butt connector like # DW05745-5 to 10 gauge wire sold by the foot # 10-1-1 which will connect to your trailer battery positive terminal. As you stated the negative terminal of the trailer battery will be connected to the...
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  • Recommended Trailer Wiring Harness for 2013 VW Jetta SportWagen
  • The EcoHitch # 306-X7284 is a great choice! In order to add wiring to tow your boat (those are really cool, by the way), you'll want to use the Tekonsha # 119179KIT which comes with a circuit protected Modu-Lite converter to help protect the electrical components on your vehicle. I recommend using the Tekonsha over the Curt # C59496 harnesses because the converter is a little bit more reliable and since you're likely going to have LED lights on your trailer, the slight difference in amp...
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  • Where Does the Charge Line Circuit Run To On The Back Of a 6-Way On a Toad
  • If you are using the Blue Ox 7-Wire to 6-Wire, Coiled Electrical Cord part # BX88206 which it sounds like you are then you will need to attach the 12 volt power wire from the vehicle's battery to the terminal in the 1 o'clock position on the back of the vehicle side 6-way. In order to do this you will need the Roadmaster Battery Charge Line Kit for Towed Vehicles part # RM-156-25. If the pin for the 12 volt circuit on the vehicle side 7-way which is in the 1 o'clock position is not...
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  • How To Convert a 4-Way On a 2017 Jeep Renegade To 7-Way for Trailer with Brakes
  • In order to convert a 4-way on a 2017 Jeep Renegade so you can tow a trailer with a 7-way way that has electric brakes you will only need a few things, a 4 to 7-way adapter and a brake controller. I have two great options for the adapter and brake controller but I highly recommend going the wireless route. The wireless route only requires very minimal installation and far less modifications to the vehicle which is why I recommend this option though it will set you back a bit more than the...
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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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  • 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • Are Available 7-Way Connectors Wired for US Made Trailers
  • The 7-Way trailer wiring sockets we have available such as the Pollak Metal # PK12703 referenced in your question do indeed feature the standard US pin configuration. I have attached an image that shows the pin locations and functions that you can use for reference. This is a 7-Way for the vehicle end. For the trailer end you will use # PK12702. Keep in mind though that the actual wire color used on both the vehicle and trailer can differ. Because of this it is always best to test the...
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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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  • 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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  • Connecting 7-Way Trailer Connector to 2015 Subaru Outback Wagon
  • Yes, you need to combine the stop and turn signals because the trailer connectors use combined wiring. There's a couple ways you can do this. The easiest from scratch is to get a 4-way wiring harness that's plug and play into your 2015 Subaru Outback and then convert it to a 7-way. You can use part # 118467 for the 4-way and we have our own conversion kit using part # ETBC7. Part # 118467 includes a converter to combine the wiring and then use our kit to convert that 4-way to a fully...
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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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  • 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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  • 2003 Ford Ranger 4-Way Trailer Wiring Recommendation
  • If you really wanted to hardwire in a 4-way you could use the part # 18252 for trailer wiring in your 2003 Ford Ranger but we have a custom fit, plug-and-play option that will work much better and install a lot easier with the part # 118344.
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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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  • 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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  • 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 Replacement Molded 7-way Trailer Plug and Cord
  • The Epicord # 277-000143 7-way plug you'd looked at would indeed make a better connection than something like the # H20044 that just has the single contact. Keep in mind, the wire color coding on this plug/harness might be different than what you already have, so be sure to look at the chart on the # 277-000143 product page that lists the wire colors and their purpose. Are you having issues with the plug not staying fully seated? Because the spring loaded lid for the trailer connector...
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  • How To Add Third LED Brake Light On Trailer
  • If you would like to add a third brake light that is LED I recommend to use the Curt 2-To-3-Wire Tail Light Converter part # C56196 because it is more compatible with LED lights in our experience compared to the Tow Ready version part # 118158. Since your trailer has a combined wiring system the the converter will separate it so the third brake light will only come on when braking. I also recommend to use diodes to prevent feedback with Roadmaster Single Park Light Diode part # RM-690....
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  • What Plug Fits the 337TC1002 Horizontal 2 Pin Connector?
  • To fit the Buyer's Products 2 Pin Horizontal Socket # 337TC1002 you can use the Buyer's Products # 337TC2002 which is a 2 Horizontal Pin plug. This plug and socket require 6 gauge wiring and can carry up to 40amps. As an aside, if you're spending a lot of time dry camping like you mentioned in your email, you may want to have a look at the Redarc In-Vehicle BCDC Dual Input Battery Charger # 331-BCDC1240D which is ideal for battery banks rated 200 amp hours or higher. This will allow...
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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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  • Troubleshooting Trailer Brake Lights and Turn Signals Not Working After Installing 7 Way on Vehicle
  • If you've just installed a 7 way connector like the # ETBC7, you'll want to start by testing the plug on the vehicle using a circuit tester like the # PTW2979 to make sure that each pin is operating properly; you can refer to the photo attached or a helpful article that I've linked for information on testing the circuits. I would also recommend making sure that your ground wire on this harness is firmly grounded to a paint and rust free spot, as ground wires are the most common cause for...
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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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  • Using a Circuit Tester from Wiring Harness Kit to Determine Wire Connections on 2019 Hyundai Tucson
  • The Upgraded Modulite Vehicle Wiring Harness Kit w/ 4-Pole Trailer Connector and Installation Kit # 119147KIT comes with a basic circuit tester that has an alligator clip on one end that connects to a ground like the metal frame on your vehicle. Then you will use the sharp point to insert into the wire connection while you run one lighting function at a time. The LED bulb will light to reflect the function it sees on that wire. You can see this in the attached video at the 2:00 mark. The...
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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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  • Bypassing TIPM for Trailer Wiring Fix on 2004 Dodge Ram 1500
  • The TIPM setup of your 2004 Dodge Ram 1500 which handles your trailer wiring is a huge pain. At this point I would cut your losses with it and bypass it for the trailer wiring. All you will need is the Upgraded Circuit Protected Tail Light Converter Hardwire Kit # 119178KIT along with 4-Pole to 7-Pole Adapter # 37185 if you do not have a brake controller or # ETBC7 if you do have a brake controller.
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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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  • Can Curt Echo Brake Controller be Installed in 4-Way/7-Way Adapter and Still Work
  • That's actually a really good question! All the Curt Echo # C51180 needs to operate properly are the basic trailer lighting functions (found on a typical 4-Way), and then 12V power. If you already have a 4-Way/7-Way adapter like part # C57672 then all you'll need to do is run a length of 10 Gauge Wire # 10-1-1 to a 30A Circuit Breaker # PK54530 and then to the positive battery post on your tow vehicle. If you don't already have an adapter then you can just get the Upgrade Kit # ETBC7L...
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  • Converter for 2018 Freightliner With Separate Lights
  • The item that would work for you is the ModuLite Circuit Protected Vehicle Wiring Harness with Install Kit # 119190KIT. This kit has a converter that will adapt the 3-wire system on your 2018 Freightliner to work with the 2-wire system on your trailer. To make the installation easier I recommend using ModuLite Installation Wiring Kit # 118151. You would then be able to use adapter # 30717, plug the 4-way in and wire the remainder of the 7-way. I've added links to video reviews of these...
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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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  • 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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  • 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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  • How To Mount Pollak Connector PA66GF30
  • The Pollak Connector PA66GF30 I believe is the same if not similar to the Pollak Replacement 7-Pole, RV-Style Trailer Connector Socket part # PK11893. If that is the case you can use the Mounting Bracket part # PK12711U and Curt No-Drill Bracket for 6-Way or 7-Way Round Trailer Connector Mounting Bracket part # C57202 to mount this to the trailer hitch.
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  • My Vehicle has a 4-Pin Trailer Plug, but Trailer has 7-Pin Trailer Plug
  • If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part # C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give you trailer light functions. If your trailer has a 7-pin connector, then it likely has electric trailer brakes and an onboard battery. If you want a fully functioning 7-way trailer socket on his vehicle, then the installation will be a bit more...
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  • Is There a Wiring Harness That Fits 2012 BMW X5?
  • There is a wiring harness available for your 2012 BMW X5 that will allow you to tow your popup camper. The ZCI Circuit Protected Vehicle Wiring Harness # 119250KIT will install in your SUV via clamps and a module that connects to your car battery to get power. This will not require you to go to your dealer for any type of programming and is a straightforward install. I recommend using mounting bracket # 18144 to keep the 4-way in place as you tow. I also recommend checking out Ball Mount...
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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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  • Recommended Trailer Wiring for 2015 BMW X5
  • For your 2015 BMW X5, I recommend the Curt Powered Tail Light Converter Kit with 4-Pole Flat Trailer Connector # C56190KIT. You can use the attached video to assist. You can route the connector down through panels or grommets to the hitch location. I recommend using a mounting bracket like # 18144. The s8sla trailer coupling preparation from what I can find means wires may be run but at not completed. I recommend using the above kit to avoid any issues and give you what you need.
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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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  • 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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  • How To Hook Up Utility Trailer Lights To Trailer Connector
  • Yes, it is possible to power a flood light via the battery charge line on the trailer connector. The battery charge line is already fused so all you would need to do is run a power wire part # 10-1-1 from the back of the trailer connector to the light. That said, you would probably want to be able to turn the light on and off at your leisure so you would also want to install a switch part # PK34212 on the power wire from the trailer connector to the light. The light would then need to be...
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  • Wire Gauge Size of the 40 Ft 5-Way Trailer Wiring Harness A40W5B
  • The 40 Ft 5-Way Trailer Wiring Harness part # A40W5B uses 20 gauge wire according to Optronics. This is pretty standard and will work for the vast majority of trailers without issue.The Wesbar 5-Pole Flat Connector part # W002290 uses larger 16 gauge wire if that is what you are looking for.
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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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  • Parts Needed to Add Wiring for Trailer Lights and Brakes
  • I recommend using the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector # e99011 to start off. This gives you a 7-Way connector and a clean and organized way to connect all of your wiring. Then for the wiring for your lights I recommend using the Wishbone Style Wiring Harness # A25W2GWB. This is 25' long which will give you enough for the length of your 16' trailer plus some extra wiring to make sure you have enough to connect all of your lights. You will...
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  • Diagram of Functions on 7-Way Plug
  • I made a diagram for you which shows the function a 7-way plug for both a vehicle-side plug like what you get with the Hopkins Endurance Quick-Install 7-Way Trailer Connector with Universal Pigtail Harness # HM47210 or Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector # 30717, as well as a trailer-side plug like the 7-Way Molded Connector w/ 15' Cable - Trailer End # 50-67-103 or 7-Way Connector - Trailer End # 54-77-003. I have also added a link to a help article on trailer wiring...
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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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  • 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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  • Trailer Wiring Harness for 1996 Jeep Grand Cherokee
  • The Hopkins # HM48895 is intended for use with vehicles that have LED tail lights and is not the recommended harness for your 1996 Jeep Grand Cherokee. There are 4-way harnesses with converters that will fit your '96 Grand Cherokee that I recommend using: the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118349 if your Jeep does NOT have the factory tow package or the Hopkins Plug-In Simple Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector #...
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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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  • 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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  • 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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  • Recommended Wiring Harness to Bypass Factory Trailer Wiring on 2003 Dodge Ram 2500
  • To bypass the factory trailer wiring on your 2003 Dodge Ram (which is indeed known for some fun issues) I recommend using the Curt T-Connector Vehicle Wiring Harness # C55504. This harness will plug into ports behind your truck's tail lights to provide you with a new 4-Way connector that doesn't go through the factory trailer wiring circuits. If you are currently using a 4-Way to connect with your trailer then this is all you need. If you have a 7-Way then you can just add the Hopkins...
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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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  • 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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  • Recommended 7-Blade to 6-Pole Connector Adapter With Brake Output and 12V Hot Swiched
  • Unfortunately I can't see the photo as it didn't come through, but your description helps me understand what you need. It is not uncommon for the brake output and 12V lines to be switched on the 6-way. I recommend the Hopkins Endurance Multi-Tow Trailer Connector Adapter - 7-Way to 6-Way, 5-Way or 4-Way # HM47570 which has a quick change plug to simply swap those connections as needed. Unfortunately we don't have a Mighty Cord brand product that works in this same way, but I think you...
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  • How To Replace the 4-Pole On a Blue Ox Base Plate Kit with a 6-Pole
  • The 6-Way Super Sealed Connector with Cable part # 50-86-007 has mounting holes spaced 2-7/8" to 3-3/8" apart. That said, if you have the Blue Ox Base Plate Kit part # BX2628 on your 2013 Ford Edge then you will want to use the Blue Ox 6-Pole, Round Pin, Trailer Wiring Socket part # BX294-0902 which is designed exactly for this base plate kit and will be a direct replacement. Then, in order to run the charge line to the battery you can use the Battery Charge Line Kit for Towed Vehicles...
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  • Is the 7- and 4-Pole Trailer Connector Socket a Fit for Ford Trucks
  • The 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring # HM40975-11998 is a hard wire application, as you can see in the linked installation video we made of this being put on a 2008 Ford F-250. If you only need to connect the plug, which is 7- and 4-Pole Trailer Connector Socket # HM40975, that is a direct replacement for many different years, makes and models of Ford trucks with a factory 7-way; for example it is a fit for a 2018 Ford F-150. If you let me...
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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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  • 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 Wiring Adapter Recommendation for Audi Q7 Towing Trailer with LED Taillights
  • German vehicles are notorious for not liking LED trailer taillights. Typically they won't work and a bulb out sensor will go off. We have two adapters for that. If your float has a 4-way connector the adapter you'd need is the part # TR20141 or if it's a 7-way part # 20142.
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  • Will Curt 5th Wheel/Gooseneck Custom Wiring Harness for Aluminum Beds C57010 fit 2019 Ford F-250
  • I checked with Curt and the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector for Aluminum Beds # C57010 WILL fit your 2019 Ford-F-250 with a factory 7-way so you did not order the wrong item. This harness will give you a 7-way and it does have a sharp 90-degree angle to fit in the sidewall of your F-250's bed, just like the Bargman # 54701-007-010 so you can stick with the Curt # C57010 and it will work great for you.
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  • Brake Controller Installation on 2018 Toyota Highlander
  • You'll need to choose a brake controller and the # ETBC7 brake controller installation kit. The install kit includes an adapter to convert the 4 pole you recently installed to a 7-way. I'd recommend a proportional controller like the Tekonsha Primus, part # TK90160. Your Highlander is very sensitive to power feeding back into the brake lamp circuit, so instead of the pigtail included with the Primus, you'd need to use the # 7865 which has a diode installed on the brake lamp circuit to...
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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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  • Wiring Harness and Brake Controller Recommendation for 2001 Nissan Xterra
  • It's always possible that the dealership threw a hitch on your 2001 Nissan Xterra and didn't bother with the wiring harness for whatever reason, but regardless of how we ended up here- I have a solution for you. There aren't any "plug and play" wiring harnesses available for the 2001 Xterra, so you're going to need a splice in (hard wire) solution like the Curt Powered Tail Light Converter # C59236 . This harness requires a direct connection to the battery that will help reduce strain on...
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  • Troubleshooting 2002 F-250 Towing Horse Trailer with Working Exterior Lights but No Interior Lights
  • It sounds like the interior lights on your trailer are powered through the 12 volt circuit on your Ford's 7-way. So, start by testing to make sure that pin is active. On a standard RV style 7-way, this is located at the 1 o'clock position. I've attached a diagram for visual reference. Using a tester like # PK12741 would be the easiest. You could also simply have a case of corrosion on/in the connectors that is preventing the +12V auxiliary power from reaching the trailer. If this is...
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  • Recommended Trailer Wiring Harness for 2011 BMW X3 28I
  • For your 2011 BMW X3, the ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit # 119250KIT is a great choice if you don't want to splice into your vehicle wires, but it is more expensive due to the zero contact interface sensors. If it were me, I'd use the Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness with Installation Kit # 119190KIT confirmed to fit your vehicle and use the quick splice connectors on the factory wires....
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  • Will the 1/2 Inch Metal Loom Clamps Work On a 5/16 Inch Frame Rail
  • Yes, the Metal Loom Clamp part # A0500 will work on a trailer frame that is 5/16" thick. The Metal Loom Clamp will actually work on pretty much any frame thickness but you will need to make note of the size screw used. I recommend the Hex Screw part # 101131802 for a 5/16" thick frame as it is 1/2" long. The Wire Loom part # 459075 can then be added to protect your wiring. I have attached a list of our other wiring accessories for you below as well.
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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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  • Fifth wheel Wiring Recommendation for my 2007 Ram 2500
  • I have exactly what you need but the Bargman 5th Wheel/Gooseneck 90-Degree Wiring Harness part # 54701-009 is designed for Ford. Instead use the Bargman 5th Wheel/Gooseneck 90-Degree Wiring Harness part # 50-97-410 this will give you exactly what you need to get this installed. It will plug in directly between your current plug for you 7-way on the rear of the truck. This will give you one both in bed and on the bumper. Check out the video we did on the installation of it that I have...
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