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Expert Answers about Wiring


  • Curt # C56190 Taillight Converter for 2013 Audi Q5
  • I'm not sure which video you're speaking of, but I've confirmed with Curt that the # C56190 is indeed the correct taillight converter for your 2013 Q5. The # 55151 wiring kit is also needed to make the fused connection at the battery. I've provided you with a diagram showing an install diagram. There should be 5 wires exiting the 'input' side of the converter, a white ground wire, brown for running lights, yellow for left turn, red for brake light, green for right turn and black to the...
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  • Trailer Hitch and Wiring Recommendation for a 2015 Kia Sorento 4 Cylinder
  • The trailer wiring kit part # 56146KIT is the correct wiring kit for your 2015 Kia Sorento with a 4 cylinder engine. The 6 cylinder engine models with the tow package can use the custom fit kit part # C56151 instead. The correct hitch would be the Curt Hitch part # C13152. I attached an install video for you to check out as well. If you plan on doing 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...
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  • Mounting Bracket Recommendation for Use with 4-Way to 7-Way Adapter part # 37185
  • The correct bracket to use for the 7-Way Adapter part # 37185 is the Mounting Bracket part # 18138. This comes with the bracket and the mounting screws.
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  • 7-Way Trailer Connector for a Truck that has a 4-Way Flat Connector
  • Are you sure it is a 6-Way and not a 7-Way blade style such as # 37185? The center counts as a pin. I have not heard of a 6-Way blade style connector, not to say that it doesn't exist but I haven't seen one myself. There might also be a way to add a 7-Way to the truck without having to cut or splice anything. If you can tell me the year, make, and model of the truck I can determine if there is a 7-Way that will work other than a hardwire option.
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  • Replacement OEM 7-Way Trailer Connector for 2008 Honda Ridgeline
  • I believe the 7-way on your Ridgeline plugs into a US car connector. You can check this by unplugging the damaged 7-way connector from the wiring harness that plugs into the back of it, and comparing what the connector looks like, compared to the left-hand panel in the photo I've provided for you. If they match, you can use the # HM40975 as a replacement for your 7-way. We don't have the OEM Honda part, but this connector will provide you with a functional 4-pole, as well as the 7-way....
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  • No 12 Volt Power to Trailer Connector on a 2002 Chevy Silverado
  • This is not an uncommon situation for your generation of Chevy Silverado. If you remove the cover on the power distribution box, look for a row of larger fuses on the left side of the box (if facing the motor from the front of the truck). If there is no fuse or a blown fuse in the slot closest to the front of the truck in that row then you will need to install a new 40 amp fuse. If there is no wire attached to the post nearest that fuse location you will have to manually run a wire from...
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  • Low Beam Headlight Not Working But High Beam Does Work
  • It sounds like there could be a fuse blown or damage or corrosion in the bulb socket. Bulbs that have both high and low beam functions have 2 filaments in them so it is also possible that the low beam filament has burned out. If you can tell me the year, make, and model of the vehicle I can recommend some replacement bulbs.
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  • Trailer Connector Adapter To Convert 4-Pole on Vehicle to Tow 7-Way Equipped Trailer
  • We do indeed have an adapter that would work for you, the part # 37185 you referenced. This adapter would plug into the 4-pole on your truck. There are four loose wires as well, but if you don't need the 12-volt power or brake output circuit active, you'll just need to ground the white wire to the truck frame. You can bundle up the remaining wires and tuck them up out of the way. The adapter will also provide you a functioning 4-pole. To see a product demonstration video featuring the...
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  • Installing New 7-Way Harness On Camping Trailer With Electric Brakes
  • I have attached a helpful article that explains trailer wiring. You are correct that most diagrams do list the Yellow wire for the left turn and green for the right turn wiring. Since you are re-wiring the entire trailer you can easily make sure you run the wires to match your 2011 ford Explorer wiring. You can test your Explorer wiring by using a circuit tester like part # 3808. Test each pin for function and not by color. Then match the pins on your trailer connector to the mating...
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  • Recommended Coiled Adapter To Connect 7-Way Round On Motorhome To 4-Way On 2014 Jeep
  • We do have the coiled adapter you need. It is the Wesbar Coiled Adapter, part # 787196. This adapter will connect to the 7-way on your motorhome and you can plug the 4-way flat connector on the front of your Jeep into the other end. This coiled adapter is 8 ft long, which should be plenty for you.
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  • How to Wire a Replacement 7-Way for a Gooseneck Trailer
  • 7-Way connectors like the # A7WCB that you referenced should be wired by function and not color. Since trailer manufacturers can sometimes use non-standard color wires for the taillight functions of their trailer it is best just to determine the function of each wire from your trailer's wiring and then wire it by function to the 7-way you end up getting. What you can do to determine the function of each wire is use a 12 volt battery like a car battery and run a jumper wire from the positive...
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  • Troubleshooting Brake Light/Left Turn Signal on a Trailer Towed by 1999 Chevrolet Silverado
  • The first thing I would test is the trailer connector on your 1999 Chevrolet Silverado using a circuit tester like part # 3808 to see if the problem lies in the trailer or in your vehicle. See the linked video to see how to do this. You will be testing for brake/stop light functionality of the circuit and this will tell you if the problem is on the truck or the trailer. Also to ensure that your trailer connector is wired properly, we recommend using the circuit tester to match pins by function....
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  • Part Recommendations For Flat-Towing A 2006 Hummer H3
  • In order to be able to flat-tow your 2006 Hummer H3, there are 5 items needed. You will need base plates for the Hummer, a tow bar, safety cables, lighting for the H3, and most states now require a supplemental brake system. The base plates I recommend are the Roadmaster Base Plates, part # 2505-3. When the front arms are removed the system is virtually invisible. The tow bar I recommend is the Roadmaster Falcon 2 Tow Bar, part # RM-520. This tow bar has a weight capacity of 6,000...
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  • Suggested Frame Clips to Secure Rubber Brake Lines on Saltwater Boat Trailer
  • If your boat trailer has a frame design that will directly accept the clip-in-place Redline # 464600 frame clips then this will be your easiest installation. We do also offer 1/2-inch metal loom clamp # A0500 from Redline that has plated steel construction and a rubber sleeve to prevent friction damage to the wire or tubing secured in it. The enamel-finish clips # 464600 could still be spray-painted with an additional coating of paint for extra protection from corrosion, and this could...
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  • 2011 Range Rover Sport Towing a Trailer with LED lighting
  • The Tow-Ready trailer connector adapter # 20142 you referenced is designed to work on a range of European import vehicles. This adapter will prevent low current draw on your LED trailer lighting from triggering error messages on your Range Rover Sport dashboard display. Before installing this adapter it is suggested that you check that your trailer connector's contacts are clean and free or dirt or corrosion. You might also want to apply dielectric grease like # LT37534. I included...
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  • Recommended 7 Way to 4 Way Adapter for a 2015 Volkswagen Tiguan Towing a Trailer with LED Lights
  • The 7-way to 4-way adapter you need is the Tow Ready # TR20141. It will work with your 2015 Volkswagen Tiguan towing a trailer equipped with LED lighting. The Tow Ready adapter # TR20141 has built-in load resistors to simulate more load so your 2015 Tiguan does not give the bulb out sensor error. I included a video review for you too.
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  • How To Wire Replacement 7-Way Connector On 2004 Chevrolet Suburban
  • I have attached a photo of the layout for a standard 7-way connector you can check out. This should be the same layout as the plug you are replacing on your 2004 Chevrolet Suburban. If you had an aftermarket 7-way plug installed you may need to use a circuit tester like part # 3808 to check the wire functions and make sure they are connected as shown in the attached photo.
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  • Brake Controller Does Not Work when Using 7-Pole Round to 7-Pole Blade Adapter
  • It does sound like something is mismatched in the wiring. Either the truck or the trailer would appear to not be following the standard pin out. On the output side of adapter # HM47425 the brake pin is in the 5 oclock position if looking at the pins. If looking at the back of it where the wires attach it would be in the 7 oclock position. I have included a link to a help article that shows how different trailer connectors are normally pinned out so you can compare them with what you...
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  • How to Install 119179KIT on 2012 Lincoln MKZ
  • I don't have specific written instructions for the # 119179KIT to get installed on your 2012 Lincoln MKZ, but I can do you one better. I attached a video that details every aspect of the install process of this wiring harness on a very similar MKZ as yours.
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  • 20 Amp Power Inlet Recommendation for an RV
  • Yes, the # 14150 that you referenced is a 20 amp power inlet that works with any standard 20 amp extension cord so it would work well for you.
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  • Troubleshooting 7-Way on 2001 Chevy Silverado that Stops Functioning When Headlights are On
  • This sounds like a ground issue. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. I suspect that there is corrosion on the ground pin of the connector and cleaning it with fine grit sandpaper will fix it.
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  • 6-Way Vehicle to 7-Way Trailer Adapter Recommendation
  • We have exactly what you need. It sounds like you have a 6-way round connector on your 1999 Ford F-250 and need to tow a trailer with a 7-way blade connector. All you need is the adapter part # 47435. Check out the review video. The # HM47083 that you referenced is the opposite adapter you would need. It would be for if the vehicle had a 7-way and the trailer had a 6-way.
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  • Is Optronics 7 Pole to 5 Pole Flat Wired Adapter Waterproof
  • For something to be considered waterproof it has to be able to be submerged under water for a certain amount of time and not let any water in. Based on that the Optronics adapter # A57WB is not technically waterproof. But at the same time you should unplug the trailer from the tow vehicle prior to submerging the trailer in the water so as to eliminate any chance of a short caused by water. Using dielectric grease, # 11755, on the trailer connectors/adapter will repel moisture and would...
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  • 4-Pole Flat Trailer Wiring Harness for 2003 Nissan Xterra Without Factory Harness
  • We can help you! We do offer several options in 4-pole trailer wiring harnesses to fit your 2003 Nissan Xterra that did not come from the factory with one in place. All can be seen on the link provided. The Curt # 56146KIT is a good choice for its high current capacity. Each will require a bit of wire splicing and I have linked a video showing harness installation in a different Nissan vehicle. No matter which harness you choose the installation process will be essentially identical....
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  • Brake Lights on 2012 Semi Trailer Work But Not Brake Lights on 2004 Freightliner
  • Since your semi trailer brake lights are working but the tractor's brake lights are not working, it sounds like the wiring for the trailer lighting is independent of the tractor's brake lights. If all of the trailer lights operate as they are supposed to then I would first check the fuse panel in the tractor for a blown brake light fuse or perhaps for corrosion in the fuse holder. You can also check the individual brake lights on the tractor for signs of a weak ground connection (especially...
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  • Blinkers Do Not Work with Running Lights On on a 2007 Freightliner XL Classic
  • You will first need to make sure that the new tail lights are wired the same as the old ones. There are basically 2 types of wiring systems. First there is a 2-wire system that has combined turn signals and brake lights on the same circuit/bulb. And there is a 3-wire system that has separate circuits/wires and bulbs for turn signals and brake lights. On many tail lights the functions of the wires is listed on the back of the assembly. Since there isn't a standard wire color/function code...
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  • Trailer Brake Lights and Turn Signals Work But Running Lights Do Not
  • In order to determine where the problem is you will first need to test the connector on your 2011 Chevy Silverado without the trailer plugged in. Basically you will use a circuit tester such as # 3808. Turn the running lights to the on position in the truck. Then test the connector to see if the running light circuit has power. If it does not then the issue is on the vehicle side. It could be a blown tow package fuse. Using the owners manual, find the location of the tow package fuses...
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  • Wiring a Camper Shell Third Brake Light on a 2011 Chevy Silverado
  • Like you said, most trailers in the US have what is called a 2-wire or combined system with the turn signals and brake lights on the same circuit. You would not tap into the tow package wiring if you need just a brake light signal. There is a dedicated brake light only wire located up under the dash and to the left of the steering column. It is with a wire bundle held together with a white tag. There should be an orange wire that is the center high mount stop lamp wire (CHMSL) that you...
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  • Recommended Items To Convert Separate Wiring On International 4400 Truck For Towing
  • There is a couple things you will need to get for your 4400 International Truck. since 99 percent of the trailers in the US are combined systems changing the wiring on the truck is really the best option. First you will need an Upgraded Modulite Vehicle Wiring Harness Kit, part # 119147KIT. This will convert the separated signals on your truck and feed them to the 4-way connector included with the kit. You then need to install a Universal Installation Kit for Trailer Brake Controller,...
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  • How to Wire Up a 12 Volt Accessory Circuit of a 7-Way Connector
  • When installing a 7-way connector like the # PK12703 that you referenced you will want to wire up the 12 volt accessory circuit with 10 gauge wire like the part # 10-1-1 and run it through a 40 amp breaker like the part # 9510 to the positive battery post of your vehicle.
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  • Adapter Recommendation for a FJ Cruiser with a 4-Way Towing a Trailer with a 7-Way
  • Yes, the Adapter 4 Pole to 7 Pole # 30717 that you referenced will do exactly what you want and will allow your FJ Cruiser to connect to your trailer that has a 7-way. A better choice might be the # 37185. This comes with a mounting bracket and a 4-way on the side of the 7-way as well. Either adapter will allow to tow your trailer and all of the taillight functions will work properly.
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  • Wiring 2010 Subaru Outback to Tow European Spec Trailer
  • A European 7-Way trailer connector has the same functions that a US 4-Way has. We do not have an adapter or a harness made with a European 7-Way. If your 2010 Subaru Outback was made for the North American market then you can use the Curt harness, # C56040 if it's NOT a sport model or # C56111 for sport models. In order to get it to work with a European 7-Way, you would need to cut off the 4-Way end and then use another converter, # 118158 . You would attach the the white, green, and...
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  • Rental Trailer Lights Not Working with 2011 Mercedes ML350 and Prodigy RF Brake Controller
  • The Prodigy RF brake controller # 90250 is a sensitive unit. You will need to make sure you follow the hooking up procedures to the letter or it may not work properly. If you still have problems make sure that none of the tow package fuses on your 2011 Mercedes ML350 are blown. It is also possible that the trailer lights were the problem. I would assume the rental place would check that and not leave it up to you! If the trailer happened to have LED lights you would need a special...
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  • Troubleshooting Trailer Brakes that Lock Up After Rewiring Trailer
  • It sounds like the 12 volt circuit of the 7-way wiring is shorting out to the brake output circuit which is causing the brakes to lock up when the trailer is connected to the tow vehicle. This is most likely due to exposed wiring from when you rewired the trailer. I would go over all the connections you made looking for exposed wire and fix as necessary. I attached an FAQ article on trailer wiring for you to check out as well.
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  • Troubleshooting Trailer Taillight Converter Installed on 2006 Volkswagen GTI
  • When the turn signals are activated, and you get 'bleed over' into the other turn signal, it can indicate a poor ground connection. Check the ground connection on the trailer, where the white ground wire from the trailer connector connects to the trailer. This is usually found on the trailer tongue. Make sure the connection is secure, and not corroded. Check the grounding point for each lamp. Some lamps have a separate ground wire that connects to the trailer frame, others ground by the...
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  • Troubleshooting Dim Lights on Trailer and Some that Don't Turn On
  • It sounds like there is either a lot of corrosion on either the vehicle's trailer connector or the connector on the trailer. Or, your trailer has a ground problem. First thing you should try is thoroughly cleaning the pins of the connectors with fine grit sandpaper to get the pins down to bare metal. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare metal surfaces....
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  • How to Install a 7-way and 4-way at the end of a Torklift 48 Super Truss
  • In-bed wiring used for fifth wheel and gooseneck hitch should do the trick. What you would want is the Draw-Tite 5th Wheel/Gooseneck Wiring Harness 7-Pole # 20110. This will plug in line with the 7-way at the rear of your truck and then would allow you to extend a 7-way out on your Torklift 48 Super Truss # TLE1548. If you needed the 4-way as well you would need to swap the 7-way of the # 20110 with the # C57101. This does include a back up alarm that will activate when your vehicle...
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  • Gauge Wire Used in the Curt 6-Pole Square Trailer Wiring Connector Loop # C58034
  • I spoke to my contact at Curt and he informed me that the Curt 6-Pole Square Trailer Wiring Connector Loop # C58034 uses 16 gauge.
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  • Trailer Wiring Recommend for 2009 Saturn Vue and How to Wire Up Separate Trailer Wiring on Trailer
  • You will want to install a 4-way on your 2009 Saturn Vue. For that you would want the Curt Wiring Harness part # C56026. Now for the trailer wiring you will need to use a converter like part # 118158. Going this route will ensure that if you were ever to need to tow a different trailer with your tow vehicle, or have someone elses vehicle tow your trailer everything would be compatible.
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  • How to Extend the Pollak Trailer Connector Adapter # PK12727
  • All of the adapters like the part # PK12727 that you referenced would need to be extended in order to be 3 feet long. To do this you would need to cut the wires and then wire in a length of wire for each circuit so that it is long enough for what you need. I would recommend 10 gauge wire like part # 10-1-1 that is sold by the foot.
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  • What is the Functionality of Hopkins 4-Pole to 7-Pole and 4-Pole Adapter # 37185
  • The Hopkins 4-Pole to 7-Pole and 4-Pole Adapter # 37185 that you referenced accepts a vehicle's 4-pole flat trailer connector and adapts that type of connector to a 7-way RV-style blade connector socket. This socket accepts a male trailer-side 7-way plug like # H20046. The Hopkins adapter also provides a 4-pole socket, meaning that with this item installed the lights for either a 4-pole- or 7-pole-equipped trailer can be connected to the tow vehicle. The other wire leads on the Hopkins...
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  • Recommended Adapter To Use 7-Way On Motor Home And Two 4-Way Connectors
  • We do offer just what you are looking for. I recommend the Hopkins Adapter 7-pole to 4-way and 5-way, part # 37385. This has a 4-way and a 5-way connector side by side and a 7-way that connects to your vehicle on the other end. A word of caution if you plan on using both the plugs at the same time. You want to make sure you do not overload the motor home circuit by drawing too much amperage when both plugs are being used.
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  • Replacement 7-Way Recommendation for a 1994 Ford Bronco
  • The easiest way I can recommend you replace the 7-way on your 1994 Ford Bronco would be to go with a part # 20023. You will have to cut the harness running from your 7-way and then wire the new 7-way by function. To determine what wires go to each other you can use a circuit tester like part # 3808 to test all of the wires by function while a buddy applies the different taillight functions of your Bronco and then wire it by function according to the diagram I attached.
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  • Running Lights on Trailer Stay On All the Time
  • This sounds like a ground issue or it could also be a short. Look for any pinched or frayed wires on the trailer and fix as needed. This could cause a short resulting in constant power draw. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector...
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  • Recommended Trailer Wiring Harness For 2014 Toyota Sienna
  • For you 2014 Toyota Sienna I recommend the Tow Ready Custom Fit Vehicle Wiring, part # 118498. This harness plugs into the vehicle wiring without cutting or splicing into your Sienna wiring. After connecting to the wiring behind the tail lights you simply run the hot lead to the battery using the included fuse and you have a 4-way connector at the rear of the vehicle. Using this system with the powered Modulite protects your vehicle from overloading the electrical system on your Sienna...
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  • How Many Circuits are Supported by the Optronics 7 Pole to 5 Pole Flat Wired Adapter # A57WB
  • Thank you for your recent purchases from etrailer. The Optronics 7 Pole to 5 Pole Flat Wired Adapter # A57WB that you purchased is intended to allow a tow vehicle with an RV-style 7-way blade type trailer socket to connect to a trailer that uses a 5-pole flat type connector. The linked article on trailer wiring shows these and other connector types commonly in use. The 5th wire on a typical 5-pole trailer is usually blue in color and is there to carry signals for electric trailer...
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  • Installation Instructions and Install Video for Trailer Wiring on a 2003 BMW X5
  • The trailer wiring kit part # 119190KIT is a universal fit harness designed to fit a wide range of vehicles. The most specific information I can give regarding how it install would be to have you check out the install video I attached to the right that shows this harness being installed on a 2003 BMW X5 just like yours. This video will walk you through the entire process. I did attach a set of installation instructions to the right for you to check out as well.
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  • Trailer Wiring Harness for a 1999 Honda Civic LX Sedan
  • You could use trailer wiring harness # 56146KIT or # C56175. The only difference is that converter # 56146KIT is powered meaning it requires a direct connection to the vehicle battery to power the trailer lights. This adds another level of circuit protection between the trailer wiring and the sensitive wiring on your 1999 Honda Civic sedan. Running the power cable just takes time. I have included a link to a help article I wrote with tips on routing the power wire.
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  • Recommended 7-Way Trailer Connector Extension for a 2014 Ram 2500
  • What I recommend is the Curt universal extension # C56080. It will plug directly into your existing 7-way connector and provide you a length of 7 feet. If you only need a few more inches of play, the adapter # C57003 you referenced will work fine. I included the installation instructions for you too.
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  • Is the Arcon Replacement RV Power Cord Plug with Folding Handle # AR18203 Rated for Outdoor Use
  • I went to our warehouse to take a look at the plug and then gave my contact at Arcon a call. The caution statement "For Indoor Use Only" on the Replacement RV Power Cord Plug w/ Folding Handle, # AR18203, was definitely a poor choice of words. The reasoning behind their statement is that this plug can not be exposed directly to the elements since it is not 100% waterproof. As long as there is a door or other form of protection on the power outlet box, this will be perfectly acceptable....
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  • How to Install a 119179KIT on 2013 CTS Sport Wagon
  • To determine if you have a 2 or 3 wire system you will need to have a buddy sit in the vehicle and apply the brakes while the blinker is on. If the light that is on for the brake light starts flashing then you have a 2 wire system. If a separate bulb starts blinking for the blinker then you have a 3 wire system. I really wish I could give you specific wire colors that you could use to install the # 119179KT on your 2013 Cadillac CTS, but the best solution I can recommend for you would...
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  • Using a Taillight Converter to Wire a 2008 Chevy Uplander for a European 7-Way Trailer Connector
  • There are 2 ways you can tow the European trailer with a US 4-Way flat connector. You will either need to change the connector on the vehicle or change the connector on the trailer. Depending on which one you choose the converter # 118158 will either be on the vehicle side or the trailer side. No diodes are needed. 1). With your current setup, you will not need any diodes. The intended purpose of the diodes when used in conjunction with the taillight converter # 118158 is for a flat...
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  • Trailer Wiring Recommendation for a 2010 Range Rover HSE
  • Yes, we carry trailer wiring confirmed to fit the 2010 Land Rover Range Rover Sport HSE. The Curt wiring harness part # 56146KIT has been confirmed to fit your vehicle.
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  • Adapter Availability for Converting European Trailer Wiring for Use with 4-Pole U.S. Connector
  • We do offer a range of wiring adapters for U.S. standard trailer wiring to convert from, for example, 7-way to 4-way, 5-way or 6-way wiring. These various connector types are shown in the linked article on trailer wiring. However, European trailer wiring does not combine multiple functions on one wire like U.S. wiring. U.S. 4-pole trailer connectors combine stop and turn signals on one wire; the yellow wire carries stop and left turn; the green wire carries stop and right turn. Since...
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  • Availability of Very Long RV Extension Cord
  • If your RV uses a 30 amp plug, we have a 50 foot long extension that would work great for you, part # AR14249. If you need a 50 amp plug, we offer part # CAM55195 that's 30 feet long, which you could plug into # CAM55194 for a total of 45 feet long. However, be aware that the longer your extension cord gets, the more voltage drop you'll experience. At greater lengths, this drop may prevent certain equipment that needs high start-up voltage to operate like refrigerators or A/C units from...
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  • Troubleshooting Trailer Left Turn/Brake Light Not Functioning on Trailer Wiring
  • Most likely the problem is the ground of the trailer's left side turn signal and brake light. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare metal surfaces. To rule out your tow vehicle as the problem you can use a circuit tester like part # 3808 to test...
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  • Wiring Diagrams for 7-Way Round Trailer Connectors
  • I attached a diagram that shows how most 7-way rounds like the # PK11720 that you referenced will get wired up. As long as you got yours wired up correctly and your trailer taillights and brakes are functioning correctly that's all that should matter, but occasionally there are some trailers that end up wired slightly different than others so the diagrams we offer don't match up perfectly. In those cases you have to wire up everything by function so that everything matches up properly....
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  • Will Curt 7-Way to 7-Way LED Trailer Light Adapter # C57003 Work with 2015 VW Tiguan
  • The Curt 7-Way to 7-Way LED Trailer Light Adapter # C57003 that you referenced is intended for use with certain German-made autos when pulling a trailer equipped with LED-type lighting. I did check with my technical contact at Curt and he confirmed that this will also work on your 2015 Tiguan when pulling a 7-way-equipped trailer with LED-type lights.
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  • Troubleshooting 7-way On 2004 Ford F150 Not Showing Left Turn Signal
  • If you've tested the 7-way on the vehicle, and have determined that you have no signal on the left turn signal pin, closely examine the trailer connector. Make sure it's not damaged or excessively corroded and clean/replace if necessary. If the trailer connector checks out okay, take a look at the wiring harness that feeds the 7-way, right behind the connector. Find the yellow wire in the harness and use a circuit tester like part # 40376 to test the wire as a helper activates the left...
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  • 7-way Recommendation to Replace a 6-Way
  • I would recommend you cut off the 6-way you have at the rear of your truck and then install a # 50-87-004 in it's place. I attached a couple wiring diagrams for the two styles of connectors so that you would know how to wire up the new 7-way with the wires from the 6-way.
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  • Troubleshooting Trailer Brake Lights that Don't Function With Headlights or Running Lights On
  • This sounds like a ground issue. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare...
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  • Do Wires Need to Be Run to Vehicle Battery to Install Brake Controller and 7-Way
  • To install a 7-way on your 2014 Toyota Highlander you will need to run a wire from the 7-way to the positive post of the battery as well as up into the cab of the vehicle if you are also installing a brake controller. This process could be somewhat time consuming so on certain vehicles I could see it taking a few shop hours to complete. For more information on what it takes to install a brake controller check out the FAQ article I attached to the right. If you haven't picked out...
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  • Adding a 7-Way Trailer Connector to a 2007 Chevy Express Can with Factory Tow Package
  • If your 2007 Chevy Express Van came with a factory 7-Way but it is missing and needs to be replaced you can use # HM40975. This connector as a 7-Way and a 4-Way. It has a round receptacle in the back to plug a harness in. The harness on the van would need to look like # PK11998 in order for it to plug into the new connector. Otherwise you would use # PK11998 to hardwire the connector to the van wiring.
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  • Troubleshooting Dim, Pulsating Trailer Running Lights
  • It sounds like the problem is on the trailer wiring. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare metal surfaces. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt bed, or folding tongue,...
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  • Availability of 6-Way Trailer End Cable in 25 Foot Length
  • To construct a 25 foot long cable with a 6-way trailer plug on it, you'd want to purchase the Deka Jacketed 6-Wire Cable, part # DW04906-1. The wire is sold by the foot. You'd wire the cable onto the Hopkins Endurance # HM48440 6-way trailer end plug. Bargman doesn't offer a 6-way molded connector with a 25 foot length. You can see current pricing on the items I recommended by using the provided links.
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  • Troubleshooting Trailer Lighting Where Only One Running Light Works
  • Since all of your trailer lights operate properly with the exception of one of the running lights, this tells us that the vehicle wiring harness is probably working properly. I would first carefully check the bad light's ground and power wires to ensure that both are secured. If the light uses a separate ground wire, usually a white wire like on # MCL36AB, that ground wire needs to be affixed to the trailer frame, to a clean rust-free bare metal surface. If the light is the type that...
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  • Where to Find the Orange 12 Volt Power Wire for Wiring a 7-Way on a 2010 Ford Expedition
  • Follow the 4-way trailer connector wires from the trailer connector to the front of the vehicle. These wires connect to a factory plug along the frame rail, usually on the driver's side, between the back tires and the rear bumper (see attached picture). The factory plug should be mated to another connector which has wiring that continues back toward the bumper. There are more wires coming from the front of the vehicle than there are coming out toward the 4-Way plug. Ford wires the front...
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  • How to Install a 7-Way on a 2010 Ford Expedition EL with a 4-Way
  • The 2010 Ford Expedition should have a round connector at the rear of the vehicle where your 4 pin plug is plugged in. If there is a round connector there you can use the Replacement Multi-Tow 7-Way and 4 Pole Trailer Connector, item # 20119, to replace the 4-Way OEM connector on your Expedition. If your Expedition does not have the mating round connector under the rear of the vehicle you will need to use a 4-Way to 7-Way adapter like item # 37185, to provide a 7-Way connector at the...
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  • How to Make an Adapter that Will Go From a 7-Way Round Connector to 7-Way Flat RV
  • The problem that you will encounter that would prevent the # PK12-724 from being the correct adapter to use is that round 7-way wiring is designed where the brake and turn signals are on separate bulbs and typically RV style taillights are combined where the brake lights and turn signals are on the same circuit. You are going to need to make an adapter. Normally we tell people that they will need a round pin male connector, # PK11702 , and a 7-Way RV connector, # PK12707 , along...
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  • How to Wire Up a Boat Trailer with a Reverse Light on a Vehicle with a 4-Way Connector
  • I have a solution for you, but electricity and water do not mix well so you will want to unplug the trailer wiring harness before you submerge the trailer in the water. The best setup I can recommend that will accomplish your needs and will still allow your wife's vehicle with a 4-way to connect to the trailer would be a 5-way setup. To convert the 4-way on your Jeep to a 5-way all you will need is the # 20036. Basically this will plug into the 4-way of your Jeep and the extra wire...
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  • 5 Foot Long 4-Way Flat to 7-Way Flat Adapter
  • Not exactly, but I can come up with a 5 foot long adapter that has a 7-way male on one end and a 4-way female on the other. Basically you would need the # 18045 and then to plug in the # PK12716 into the corresponding end and you would be good to go.
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  • Taillight Converter Recommendation for a Trailer with Separate Taillights with 4-way Connector
  • I have a solution for you, but the 7-way side of your trailer wiring wouldn't easily be adapted to fit your wiring needs. A better solution would be to install the converter # C56196 on the wiring of the trailer you plan on towing with your 2007 Fleetwood Bounder 34F motorhome. This way your trailer can easily be towed by any vehicle with a 4-way. I attached a diagram that shows how this converter installs onto a trailer's taillight circuit.
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  • How Does the Tow Ready 4 Pole to 5 Pole # 20036 Install on a 2011 Jeep Grand Cherokee
  • The install for the Tow Ready 4 Pole to 5 Pole # 20036 really is pretty simple. All you will need is a circuit tester like the part # 3808 to test the wires going into the reverse light harness. The color of the wire would most likely not be red/black though. I attached an install video for this harness for you to check out as well.
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  • How to Install a Wishbone Wired 4-Way to a Trailers Wiring
  • To wire the 4-way connector you have to your trailer you will need to ground the white wire, run either brown wire to the left or right side running light circuits, run the yellow wire to the left stop/turn circuit, and the green/brown wire to the right stop turn circuit. It could be that your trailer's wiring needs to be cleaned up a bit. You will want to check and make sure all of the wire colors I mentioned only activate the circuits I said they correspond to. If not, then there might...
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  • Towing Trailer with 7-way RV Connector Using Semi Tractor with 7-way Round Pin Connector
  • I found the article you referenced and attached the text of it below. I also attached the installation instructions and diagram to this message as well. To tow a trailer that uses a RV style 7-way blade-style trailer connector with semi that has a 7-pin connector, you will need to construct an adapter that also combines the brake signal into the right and left directional signal pins. This can be done by using a female 7-pin socket # PK11720 to accept the plug from the semi, a...
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  • Adapter Recommendation to go From 50 Amp Male to 125 Volts Female
  • Without knowing what amp female side connector you need we have a few options you would need to check out. If you need a 50 amp male to 30 amp female you would want the # CAM55175. If both connectors are 50 amp rated then you would want the # CAM55562. This goes from marine-style, 50-amp power plug to a 50-amp standard power source.
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  • How to Make a 5-Way Female to Vehicle Side 4-Way Trailer Wiring Adapter
  • It sounds like you have a 5-way male connector on your RV like the part # PK11501 and are looking for a way to adapt it to your trailer's 4-way. You will need to make an adapter for this as one isn't available. You will need the part # PK11502, # 16-4B-1 which is sold by the foot and then a 4-way part # 18172. You will need to test the wires of the 5-way on your RV with a circuit tester like part # 3808 for function and then wire up the 4-way flat as needed. The wire colors of the...
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  • Troubleshooting Honda Ridgeline Blinkers that Stop Working when Brakes are Applied
  • Typically when this issue arises on a Honda Ridgeline the issue is that the "small lights" fuse under the hood is blown. This may or may not have been related to the trailer wiring you installed.
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  • Instructions to Wire Dump Trailer with Electric Brakes
  • I would use the RV-Style Trailer Connector, # PK12706, which you reference, and install the wires in the proper locations in the 7-Way connector. Our wiring page, see link, has photos that detail the wiring configuration of the 7-Way RV trailer connector for you to check out. You will need to test the functions of each wire using a 12 volt battery to determine their function. Once you know the function, you can use our trailer connector wiring diagram to make the proper connections.
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  • Troubleshooting a Trailer that Taillights, Blinkers Both Flash and Only One Running Light
  • It sounds like the problem is the wiring of your truck like it sounds you have determined already. What I would do is use a circuit tester like part # 3808 to test the circuits of your 7-way while a buddy applies the different taillight functions. Use the diagram I attached to the right for more info. The problem could be as simple as corrosion on the connector that needs to be cleaned off (inside or outside of the connector), or it could be that the wires of the connector have shorted...
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  • Installation Instructions and Wire Functions of Tow Ready Trailer Wiring Harness 119147KIT
  • I have included a link to the right to the instructions for wiring harness # 119147KIT. In the mean time the red wire is for brake lights, green is right turn signal, yellow is left turn signal, white is ground, brown is running lights, and black is the power wire. We do not re-sell returned items. We have to kit the harnesses together with the extra wire and fuse holder though so you get everything in one package.
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  • Adding a 4-Way Trailer Wiring Harness to a 2007 Chevy Monte Carlo LT
  • To add a trailer connector to the back of your 2007 Chevy Monte Carlo LT you will need to hardwire in a harness using # 18252. This harness comes with a circuit tester which you will use to determine the functions of the vehicle tail light wiring to install the 4-Way. On the 4-Way, the white wire is ground and will attach to a clean bare metal surface. The yellow wire will connect to the vehicle's left turn and brake light wire. Brown will connect to the vehicle's running light/tail...
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  • Troubleshooting Inactive 7-way 12 Volt Accessory Circuit of 2007 GMC Sierra 1500
  • I am going to go out on limb and say that you are trying to activate the 12 volt accessory circuit on the 7-way of your 2007 GMC Sierra 1500 and it isn't working so you are looking for a fuse to replace? Actually what is happening on your truck is that there are a few underhood connections that need to be made in order for this circuit to be completely activated. For more info on this check out the FAQ article I attached to the right and scroll down to the section titled, "Finalizing...
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  • Parts Needed to Convert a Jeep's 4-Way to a 7-Way
  • Yes, we have exactly what you need. To convert the 4-way of your Jeep to a 7-way so that it will adapt to your trailer that has a 7-way you have two options. If your trailer doesn't have brakes all you would need is the # 37185. This would simply plug into your Jeep 4-way and would provide a 7-way for your trailer to connect to. Now if your trailer has brakes you will need a different part. Instead you will need the brake controller install kit # ETBC7. This comes with everything...
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  • Troubleshooting Right Stop/Turn Circuit on Aluminum Trailer
  • It sounds like you have narrowed the problem down to being somewhere on the right stop/turn circuit (green wire) on the trailer. If you can use your circuit tester to test that circuit as close to the light assembly as possible to see if the light is getting voltage or not. The other possible problem is that the ground of the assembly isn't sufficient. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds...
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  • Troubleshooting Trailer Brakes that Lock Up When Connected to Trailer Wiring
  • This is a fairly common problem for trailer setups that use 6-way connectors like the # PK11604 that you referenced. The issue is that there is two accepted ways the connector can be wired up. The only difference between the two setup is that the brake output circuit and the 12 volt accessory circuits are swapped. It sounds like your vehicle is wired one way and the trailer is wired the other way. What you will need to do is swap the two circuits on either the trailer or the truck....
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  • Horse Trailer Brakes Lock Up When Connected to 1999 Ford F-250
  • It sounds like either the trailer side connector is not pinned to match the vehicle side connector or there is a short circuit (possibly due to corrosion on the pin or inside the trailer connectors) causing the brakes on the trailer to lock up. The easiest thing to check first is for dirt/corrosion on the pins and inside each of the trailer connectors. Then you can make sure that the trailer side connector is wired up to work properly with the vehicle side connector. I have included...
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  • Adding a 4-Way Trailer Connector to a 2014 GMC Sierra 1500
  • If your 2014 GMC Sierra came with a factory 7-Way you can use # 41155 to plug in a 4-Way in its place. Or you can use an adapter such as # PK12716. If your truck did not come with any trailer connector you would have to contact a GMC/Chevy dealer for the proper parts since there are currently no aftermarket 4-Way harnesses confirmed to fit your truck.
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  • Troubleshooting Non-Functioning Running Lights on Trailer Towed By 2014 Nissan Frontier
  • It sounds as if you might have a blown fuse. You'll need to check the diagram on the lid of the fuse box under the hood, and look for a fuse for the trailer running or parking light circuit, and replace it. Before plugging the trailer into the vehicle, you'll want to closely examine the running light circuit for any shorts that would have caused the fuses to blow. Start at the trailer connector, and examine it for damage. Trace the running light circuit (usually a brown wire) back to...
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  • Flat Towing Wiring Options for 2014 Ford F-150 Platinum
  • Strictly speaking, both you and your friend are correct. It just depends on which type of toad wiring harness is used. The link at right will show you all flat-towing wiring kits for the 2014 Ford F-150 Platinum. These include a custom-fit option from Hopkins, part # HM56000. This kit installs without cutting and splicing by plugging in to the F-150 tail lights and includes integrated diodes to prevent feedback. This operates as a combined lighting system.
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  • Trailer Wiring Extension to Allow Utility Trailer Plug to Reach Truck Bed Connector
  • We can definitely help you! If your trailer and truck connectors are RV-style 7-way blade types we offer extensions in various lengths. For example, if you need several feet of additional length we offer the Curt Universal 5th Wheel/Gooseneck 7-Way Extension # C56080 which is 7-feet long. If a shorter extension will suffice you might use the 28-inch TorkLift # TLW6028, 36-inch # TLW6036 or 48-inch # TLW6048. If either your truck or trailer use different connectors (the linked...
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  • Tow Ready Lamp Out Adapter Recommendation for a 2012 Mercedes Towing LED Light Trailer
  • Yes, the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass # 20142 that you referenced is designed to do exactly what you are needing. This connector is designed to let foreign vehicles with lamp-out warnings tow trailers with LED lights. You would want to plug this into the 7-way on your vehicle.
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  • Using 4 to 5-Pole Trailer Connector Adapter # 20036 for Towing Boat w/ 2011 Toyota Highlander
  • The extra pin on your boat trailer's connector is most likely a reverse lock-out for your surge or hydraulic trailer coupler. The extra circuit is tied into the reverse light circuit of your vehicle. When the vehicle transmission is shifted into reverse, the reverse light circuit energizes and activates a solenoid in your coupler, which allows you to back the trailer without the brakes applying. We do indeed have an adapter that would work for you, part # 20036. The extra blue wire on...
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  • Troubleshooting Trailer Left Turn Signal That's Not Working
  • Without knowing the year, make and model of the vehicle, I can't really provide any specifics but I can provide you some general things to check. The first thing you'll want to do is determine if the problem is in the vehicle or the trailer wiring. The easiest way to do this is to plug in another trailer if one's available and see if the problem persists. If this isn't possible, use a circuit tester like part # 40376 on the trailer connector on the tow vehicle. Activate the left turn...
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  • Installation Of Wiring Harness On 2014 Subaru Impreza
  • Many times the problem you are having is that that there is not a good ground connection. Another wire to check is the 12V power wire. It needs to be connected to the battery. Also check the in-line fuse to make sure it is in place. I have attached the installation instructions for the Tow Ready Wiring, part # 119179KIT that would be used on your 2014 Subaru Impreza that is not the WRX or WRX STi model. The instructions have a diagram included that show 6 wires being attached for the...
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  • Trailer Wiring Recommendation for a 2003 Mazda Tribute
  • We have several trailer wiring options that are confirmed to fit your 2003 Mazda Tribute, but the part # HM48895 that you referenced is not one of them. Instead you would want the part # 118343 if you don't have the tow package and part # C55255 if you do have it.
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  • Replacement 7-way for a 2015 Chevy Silverado
  • From a previous question you submitted I was able to determine that you have a 2015 Chevy Silverado. It sounds like you are looking for a replacement 7-way for your truck based on the part you referenced. If so, the correct part would be the Hopkins 7-Way part # HM40975.
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  • How to Maintenance Charge a Battery Installed on an Enclosed Trailer
  • You will need to run a separate battery for powering the accessories you mentioned from the breakaway battery. Something bigger than a typical breakaway battery would be required. Now to charge the battery you would only be able to run a maintenance charge on the battery through the 7-way as the gauge of wire would be to small to charge a dead battery. To do this you will need to run a 10 gauge wire from the trailer connector to the positive post of the battery. For that you can use...
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  • Does a Breakaway System Battery Affect Everyday Trailer Brake Performance
  • Electric trailer brakes can work on a trailer that doesn't have a breakaway system. So the answer to your question is no, the breakaway battery would not affect how normal trailer brakes will operate under normal circumstances. The only time the breakaway battery will change how the brakes are performing is when the pin of the system has been pulled and the voltage of the battery is being applied to the brake assemblies. I attached an FAQ on breakaway systems plus an FAQ on troubleshooting...
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  • Troubleshooting Install of Tow Ready Wiring Kit # 119179 Doesn't Work With Running Lights are On
  • The Trailer Wiring Kit part # 119179 fits several vehicles and several different configurations of vehicle wiring. Without knowing what vehicle you have or what style of taillights you have on your vehicle it would be hard for me to say for certain. Based on the description of how you installed the harness it sounds like you have it wired up like a 2 wire system. It could be possible that you have a 3 wire system and would need to wire it up like the illustration I attached.
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