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Expert Answers about Wiring


  • Installing a 7-Way Trailer Connector On a 2002 Toyota Tundra with 4-Way Flat Connector
  • Since the Hopkins 7 and 4-Way trailer connector # HM40975-11998 includes a hardwire harness it technically could be installed on any vehicle, including your 2002 Toyota Tundra with a 4-Way connector. But you will need to do some hardwiring and extra parts would still be needed so to make it more simple I recommend # ETBC7. With the ETBC7 all you will do is plug the 4-Way into it and then hardwire the remaining 4 wires. White is ground, attaches to truck frame, purple is reverse lights...
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  • 1995 K2500 Brake Controller Recommendation and Installation
  • That we are aware of there are no prewired harnesses or adapters available for your 1995 K2500 truck. I have a solution for you that won't require you to try and track down any wire colors though. You will need to start with a 4-way (if you do not have one). For that you would want the # 18252. From there you would need to convert the 4-way to a 7-way so that you can install the brake controller. For that you will want the Brake Controller Install Kit and 7-Way Adapter part # ETBC7....
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  • Trailer Wiring Harness for a 2012 Kia Sorento
  • Your 2012 Kia Sorento has a separate wiring system. This means that the brake lights and turn signals are on different circuits/bulbs. Trailers on the other hand have a combined system with the turn signals and brake lights on the same circuit/bulb. So you would not be able to just wire in a vehicle side 4-Way directly to the lights on the Sorento because you would either have brake lights or turn signals but not both. You will need the proper harness that includes a converter for...
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  • Wiring Needed to Connect Royal Star Motorcycle to Trailer with Separate Brake & Turn Lights
  • Since motorcycles have separate stop, turn and tail lights just like your trailer you will not need any type of wiring converter to connect them, just the mating connectors of the appropriate format. If your trailer uses a 5-round-pin connector like # PK11501 that mates with the vehicle side socket # PK11502 that you referenced, then you'll just need to wire the socket on the bike. Please take a look at the linked article on trailer wiring that shows the various types of connectors. You'll...
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  • 7-Way to 4-Way Adapter Recommendation for a 2015 Toyota Tacoma
  • The most popular trailer wiring connectors are the 4-way and 7-way like what your trailer has. To go from your 7-way to a 4-way all you need is the correct adapter, part # PK12716. This will plug into the 7-way on your truck and will provide you with a 4-way. Check out the install video I attached for more information on it.
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  • Trailer Wiring Harness Recommendation for a 2014 Volkswagen Golf TDI
  • The wiring harness you would need for your 2014 Volkswagen Golf TDI would be the Tow Ready wiring harness part # 119190KIT. This is a universal install harness that will require you to tap into the turn signal wiring to install and will require you to run a wire up to the vehicle battery. I attached an install video and a help article that details how to find the best way to route the power wire up to the battery. To access the taillight wiring you will need to remove the interior...
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  • Replacing Existing 7-way Trailer Connector on Motorhome on Ford E450 Chassis
  • Depending on the 7-way connector you presently have, we might have a very easy solution for you. Take a look at your existing 7-way, and see if it's possible to unplug the factory harness from the back of the connector. There will be a gray locking tab that needs to be slid toward the front of the vehicle before the connector can be unplugged. If it's possible to unplug the harness, the Tow Ready # 20119 would be a perfect plug and play replacement. If you cannot unplug the connector...
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  • Troubleshooting Trailer Light Wiring with a 2012 Ram 1500 Tow Vehicle
  • To determine if the issue is on your 2012 Ram 1500 or the trailer you will need to disconnect the trailer and use a circuit tester such as # 40376 to test the vehicle side connector. With the running lights on, test the pins on the vehicle side connector. If there is no power at the connector then the issue is on the truck. If there is power at the vehicle connector then the issue is on the trailer. You can check to see if the tow package fuses and relays are present or just bad by...
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  • How to Make an Inverter Adapter that Can Plug Into a 7-Way
  • What you will need first is the adapter part # HM11147650. This will plug into the 7-way of your vehicle to provide it with wiring for an inverter. Depending on the amperage draw of your electric cooler the part # SAM-250-12 could be then wired to this and you would be good to go. This inverter has a max output of 250 watts. For an inverter capable of 1,000 watts you would instead want # 02294.
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  • Activating Trailer Wiring 12 Volt Circuit of a 2004 Lincoln Navigator
  • If the 12 volt circuit of the 7-way on your 2004 Lincoln Navigator does not have a wire run to it then you would need to run a length of 10 gauge wire like our part # 10-1-1 through a circuit breaker # 9510 to the positive terminal of your vehicle battery. If the wiring is present on the connector but it is not active you will need to check the trailer wiring fuses and relays in the fuse box and replace as needed. Most likely you are missing a fuse or relay. I attached a help article...
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  • Can Extra Wires of the 4-Way to 7-Way Adapter 30717 be Taped Up If Not Needed
  • If the surge brakes on your trailer do not have an electric reverse lockout then you could just tape up all of the wires that you didn't need of the # 30717 and you would be good to go. If the trailer does have an electric reverse lockout you would need to run the yellow wire to the reverse light circuit of your trailer and then also ground the white wire and you would be good to go.
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  • 2015 Jeep Grand Cherokee Trailer Wiring Troubleshooting, 7-Way Not Active
  • Your 2015 Jeep Grand Cherokee may have the connector needed but it's not active. First, I would use a circuit tester such as # 3808 to test the 7-way connector to see if it's active. You may need to contact a Jeep dealer to have them activate the trailer wiring as it sounds like yours isn't. This is a fairly common issue that we have seen.
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  • Adding a 4- to 5-Way Adapter on a 2015 Toyota Highlander
  • What you will need is a 4-Way to 5-Way adapter, # 20036. You will have to splice into the reverse light wire to install the 5th wire (blue). You mentioned that the wires go from the rear hatch into the roof of the vehicle. If you pull or cut back the covering on those wires to reveal the actual wires you can use a circuit tester such as # 3808 to test them to find the reverse light wire. What you will need to do is chock the vehicle wheels, apply the emergency brake, and start the motor....
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  • Trailer Wiring Availability for a 1989 Jeep Comanche
  • We don't have any fit info for trailer wiring for your 1989 Jeep Comanche, but a universal trailer wiring harness like part # 119178KIT would work well since this is also the same harness recommended for the 1989 Jeep Cherokee which is what the Comanche is based off of.
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  • How to Wire in a New 7-Way to a 1997 Dodge Ram 2500
  • We don't have a wiring diagram that details what your trailer connector wiring would be based on color but I can give you an easy way to determine this. You will need a circuit tester like part # 3808 and you will want to test each of the wires for voltage when the different turn signals are applied. You might use masking tape to label each wire to make this easier. Once you have all of the wires sorted out you will then want to wire them to your new connector using the diagram I...
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  • Troubleshooting Trailer Brake Lights and Turn Signals That Are Not Working Correctly
  • The two most common causes for problems with trailer lighting functions are corroded vehicle or trailer connectors and a bad ground on the trailer or vehicle. The good news is that these two problems are fairly simple to check and correct. First, check that the main trailer connector ground wires on both the vehicle socket and the trailer plug are solidly connected to a clean bare metal surface that is free of grease, rust and paint. A weak ground can cause all sort of odd behavior from...
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  • Wiring a Third Brake Light on a Camper Shell on a 2012 GMC Sierra
  • You are correct, your 2012 GMC Sierra does have a combined wiring system with the brake lights and turn signals on the same circuit. There are a couple of options you could use to get a dedicated brake light only signal for the brake light on the cap. First, under the dash of your truck, to the left of the steering column there are some tow package wires held together with a white tag. If you pull them down there should be a light blue or orange wire that carries a brake light only signal....
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  • How To Find Reverse Light Circuit in a Vehicle for 5-Way Trailer Wiring Install
  • All vehicles have reverse lights so I can assure you that your 2012 Nissan Pathfinder has a reverse light circuit at the rear of the vehicle. It will just be a matter of tracking the thing down. I pulled up some picture of your vehicle and thankfully the reverse lights aren't in the hatch assembly as that can make the install a bit more involved. Since yours are in the main taillight assemblies you will need to access the wiring of the assemblies and use a circuit tester like part #...
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  • Trailer Wiring Recommendation for a Harley with 4-Way Towing Trailer with 6-Way Square
  • You are going to need to remove the wiring connector on your trailer and replace it with a 4-way like the part # HM48110. If your trailer has combined trailer wiring, meaning the blinker and brake lights are on the same circuit, then you would just need to match the 4-way up with the right circuits on your trailer. If the trailer has separate turn signals where the blinkers are separate from the brake lights you will need to use an adapter like the part # RM-732 to allow the signals...
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  • How to Install # 119179KIT Wiring Harness on 2014 Hyundai Elantra Sedan
  • Hardwiring your 2014 Hyundai Elantra with a Tow Ready Upgraded Circuit Protected Modulite with 4 Pole Harness # 119179KIT will entail tapping into your taillights and using a circuit tester (included) to determine which wires are your turn signals, running lights and brake lights. Once you determine the functions, you will want to run the harness's yellow wire to the left turn signal, the brown wire to the running lights, the red wire to the brake lights, and the green wire the right turn...
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  • Wiring Diagram for the Adapter 6-Pole to 7-Pole Trailer Wiring Adapter # 47435
  • To see a couple diagrams that show how the 6-way to 7-way adapter part # 47435 is wired up check out the pictures I attached. The 6-way of this adapter has the center pin as the 12 volt circuit. That is the usual circuit that gets moved around on 6-ways.
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  • Installing a Trailer Wiring Harness on 2004 Ram for Just Left Turn/Brake Lights for Factory 7-Way
  • I have heard other customers who had similar issues and they were able to get the dealer to fix the issue under warranty but only 1 time. I don't know if your 2004 Ram still has any warranty but it might be worth a phone call to a dealer to find out. Or you can install wiring harness # C55504 which plugs in line with the vehicle tail light wiring. the converter is already built in and you will not have to worry about cutting and splicing vehicle wires for installation. If you only...
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  • Troubleshooting Trailer Wiring Stop/Turn Circuit Not Functioning
  • First thing you should do at this point is test the 4-way of the wiring harness with a circuit tester part # 3808 for voltage on all of the right pins when the taillight signals are being applied. Just like in the video I attached. If the voltage checks out there but the trailer lights still don't function right then the problem is on the trailer wiring. That would mean that problem is either due to a ground issue or a short issue. Make sure that the trailer side connector are clean...
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  • 4-Pole to 4-Pole Adapter to Connect a Colorado Sport Trailer to a 2004 Ford Ranger
  • Thanks for the pictures! On your Colorado Sport trailer, I have a solution for you but the connector that came with your trailer doesn't match the typical style vehicle trailer connectors and unfortunately no adapter is available. I recommend splicing in the Draw-Tite 4-pole trailer end connector # 18004 as it will connect with your existing 4-pole connector on your 2004 Ford Ranger. Because your trailer uses separate turn signals from the brake lights, you will also need to splice...
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  • Which Wires Are Used When Installing Marker Lights On Trailer
  • For a typical trailer wiring you will have a brown and green wire for the right hand side of the trailer and brown and yellow wire for the left side. If this is a new wiring installation and you are installing wiring like part # A35W42B, the brown wire that runs down each side of the trailer is for the marker lights and tail lights. The yellow and green wires are for the left and right turn signals. You will want to tap into the brown wire for the marker lights. If you are adding...
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  • Trailer Wiring Recommendation for a 2015 Volkswagen Golf TDI
  • For trailer wiring for your 2015 Volkswagen Golf TDI you would want the wiring harness part # 119190KIT. I attached a set of installation instructions plus an install video that shows this harness being install in a similar vehicle as yours to give you an idea on how it would install in your vehicle as well. I cannot stress enough that the wire colors will not be the same, the video I attached will only show how it would install on a different vehicle. The testing process will be the...
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  • Changing a 7-Way Trailer Side Connector to a 4-Way Trailer Connector
  • Yes, you can just remove the wires from the trailer's existing connector and attach them to the new 4-Way, # HM48110. Taping off the unused wires will be fine just make sure they are secured so they are not flapping around loose. On the harness the white striped wire is ground, brown is running lights, yellow is left turn/brake lights, and green is right turn/brake lights.
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  • Recommended Safety Chains and 4-Pin Tow Wiring Connector Extender for a 2003 Toyota 4Runner
  • Thanks for your purchase from etrailer! I would go with the Hopkins 4-pole loop with cover # HM47115 because it will extend your current 4-way connector 48-inches (4 feet). If that is too long, we currently offer a 12-inch extension # 9653P. If you plan on using these extensions permanently, then I would use some dielectric grease between the connections # 11755. Then use zip ties to hold connections together and electrical tape to wrap it all up to protect it from the elements. A...
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  • How to Make an Adapter to Go from Semi Truck 7-Way Round to RV Style 7-Way Blade on Trailer
  • Either way is correct. It depends on if you want to keep the semi-style 7-Way (if you need to tow that type of trailer) or if you will never be towing a semi trailer. If you need to keep the 7-Way semi active on the truck then you would need to make an adapter to get it to work with an RV 7-Way. For that you would need a trailer side 7-Way round, # PK11702, a converter, # RM-732, and a vehicle side 7-Way RV style, # PK12707. A semi-7-Way has separate circuits for the brake lights...
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  • Recommended Wiring Harness for a 2015 VW GTI to Tow a Small Utility Trailer with Trailer Lights
  • I recommend using a heavy duty vehicle wiring harness # 119190KIT because it includes circuit protection to safeguard itself from electrical shorts. Vehicles using Pulse Width Modulation (PWM) will give your trailer lights full brightness during activation. This hasn't been tested on the GTI models yet, but my contact at Tow-Ready confirmed that it will work with the 2015 Golf and would work with the GTI just fine even though it isn't published as a fit in our fit guide. We haven't...
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  • Trailer Running Lights Flash when Turn Signals are On
  • Somewhere in the wiring the turn signal wire(s) is touching the running light wire. This is likely happening closer to the front of the trailer, perhaps at the connector but I would not rule out a short anywhere from the front to the back. Also, by any chance does the wiring on the trailer side behind the trailer connector have 2 wires associated with just 1 pin? If so this is a wishbone harness. You would have one running light wire for the left side and one for the right side but they...
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  • How to Find the Right Tail Light Wires to Install Trailer Wiring on 2006 Mercedes R350
  • First, you must connect the power wire for a powered wiring harness to the vehicle battery. It is not tested at any other location and would void the warranty. Also, you lose that extra level of circuit protection if you connect it elsewhere. A sever enough short could cause damage to that rear fuse box. We haven't had the chance to install wiring on a 2006 Mercedes R350 so I can't tell you the wire colors you will need. What you have to do is use a circuit tester such as # 3808 to test...
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  • 5-Way Trailer Wiring Recommendation for a 2004 Mitsubishi Montero Sport
  • The Modulite Power Converter 5-Way Flat # 119177KIT would be exactly what you would need. You will be able to hardwire this kit to your 2004 Mitsubishi Montero Sport taillight wiring and you will have a fully functional 5-way. Check out the install instructions I attached for more info.
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  • 30 Amp RV Twist Lock Inlet Availability
  • We actually have two RV 30 amp inlets, part # 14294 and # 51514. The # 51514 is twist lock so it would be the one you would want. Thanks for the kind words!
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  • Adapter Recommendation for an RV with Separate Wiring to Tow Combined Trailer Wiring
  • We have exactly what you need. This is a fairly common situation as most RV's are wired for separate taillights and most trailers are wired for combined trailer wiring circuits. For that you will want the Roadmaster Brite-Lite Converter # RM-732 and 4-way like part # 18002. First you will need to cut off the 4-way on your RV. Next, you will need to wire up the # RM-732 as follows. Green of the motorhome runs to the white of the converter. Red runs to red. Blue from motorhome...
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  • Right Side Trailer Lights are Not Working But Vehicle Side Trailer Connector is Working
  • You have what is called a wishbone harness. A wishbone harness has two running light wires, one for each side of the trailer, but they are tied to the same pin on the trailer connector. The yellow/brown is running lights for the left side and the green/brown is running lights for the right side. Solid yellow is left turn signal/brake lights and solid green is right turn signal and brake lights. The white wire is the ground wire. Usually if some or none of the lights are working it is...
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  • Trailer Turn Signal Does Not Work when Running Light Wire is Connected
  • This does sound like a ground issue or could possibly be a short internal to the light. 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...
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  • Adapter to Mate RV 50-Amp Power Plug to Generator 30-Ampm Plug
  • If you are looking for an adapter to mate your RV's 50-amp power plug to a 30-amp twist-lock outlet on a generator you can use Camco part CAM55422. The female end connects to your RV's 50-amp power plug and the male end plugs into a 30-amp twist-lock generator receptacle.
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  • Installation Procedure and Recommended Brake Controller for 2016 Jeep Wrangler Unlimited
  • I'd recommend you go with a proportional style controller like the Tekonsha Prodigy P2, part # 90885. A proportional controller has an internal sensor that determines how quickly the tow vehicle is braking and will send the appropriate amount of voltage to the trailer brakes so the trailer and tow vehicle stop at the same rate. This leads to safer, more predictable braking action. To install the controller, you'll need our Brake Controller Installation Kit, part # ETBC7. The kit contains...
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  • Recommended 7 Way to 5 Way Adapter for 2014 Ford F-250
  • I have just the thing for you. Take a look at the Hopkins 7 way to 5 way adapter # HM47075. The adapter plugs into a 7-Way blade style on the truck and has a 5-Way flat at the back to plug in any trailer that uses a 5-Way flat. I have included a video review of this part for you to check out.
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  • Troubleshooting Brake Lights on 1999 Chevrolet C/K Series Pickup
  • Sounds like your 1999 Chevrolet pickup does not have the tow package wiring (you can confirm this by having a Chevy dealer run the VIN number) so you'll need to hardwire a converter like part # 119147KIT directly into the taillight circuits. This will give you a 4 way connector. Check out the installation video I have included showing the converter being installed on a different vehicle. Even though the vehicle is different, it will give you a good idea of what the install involves.
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  • Dimensions of the Wesbarg Coiled 7-Ways
  • I went and pulled the WesBarg 7-Way # WG54006-046 and the # WG54006-043 from our warehouse to grab the measurements you requested. The coil diameter on both is 2-1/2 inches. For the 6 foot version part # WG54006-043 the length of just the coils is 8-1/2 inches and if measured from end to end with the coils unstretched it measures 27 inches. For the 12 foot long version the coiled portion is 19 inches long and from end to end measures 3 feet unstretched.
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  • How to Wire in a 7-way On a Trailer that has a 5-Way
  • I attached a chart that details how the # H20046 would wire to your trailer's wiring. You will notice that the wire color column on the far right says "usual," this means the color codes are always specific. On your 5-way the jacketed circuit will be the ground circuit, the circuit next to that should be the running lights circuit, next to that should be the left turn/stop circuit, next to that the right turn/stop circuit, and finally the reverse light circuit, or sometimes brake output. The...
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  • Trailer Brake Lights Do Not Work When Connected have a 96 ranger with seprate turn and brake
  • Whenever any type of adapter like # PK12716 is used to mate different types of connectors on the vehicle and trailer, connection problems can develop because of all the extra contact points. The best way to go is to install a new connector on the trailer that directly matches that on the tow vehicle so that you can avoid using an adapter. This is easily done by using a junction box like # 38656 and a new 7-way plug like # H20044. All you need to do is verify the function on each trailer...
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  • How to Find Stoplight Circuit on a 2007 Freightliner for Brake Controller Install
  • Typically the brake light circuit is found at the switch near the brake pedal of a vehicle. Usually there is a switch there with several wires coming out of it. Testing the wires for 12 volts when the pedal is depressed and none when released with a circuit tester like part # 3808 will determine which is the right one. If there is a third brake light fuse or circuit on the vehicle this can also be used. I attached a help article on installing brake controllers for you to check out as well.
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  • Troubleshooting a Brake Controller that Only Activates with Manual Override Lever
  • If a brake controller only activates with the manual override lever one of two things are going on. Either the controller is not properly attached to the right stop light circuit, or the controller itself is bad. You will want to use a circuit tester like part # 3808 to test the circuit that the red wire of the controller is attached to on your 2009 Ford F450. It will need to have voltage when the brakes are applied and none when released. If you verify that the controller is attached...
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  • Troubleshooting Wiring On 2010 Ford Truck And Rewired Camping Trailer
  • Wiring can be tricky so you will want to make sure you have all of the lights installed and properly grounded when wiring to prevent unpredictable results. First, you will want to make sure all of the functions on the harness at the back of your 2010 Ford truck are functioning correctly. You can do this by using a circuit tester like part # 3808. Enlist the help of someone who can sit in the cab and run through all of the functions to make sure they are all wired correctly. You...
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  • Needing a 6-Way to 7-Way Adapter for an RV with a 6-Way Pin to Connect a Race Car Trailer
  • I have a couple solutions for you, but the adapter you are looking for doesn't currently exist. The square 6-way style connectors are an older style that really aren't used anymore. Your best bet is to replace the 6-way on your Holiday Rambler with a standard 7-way like # HM40975-11998. To install this, remove the wires from your current 6-way and splice the wires together by function. Use a circuit test like # 40376 to test the wires on your Rambler because it's likely the colors won't...
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  • Brake Light Fuse Keeps Blowing After Installing a Trailer Wiring Harness
  • What you are describing is a classic short circuit. Two wires touching or a wiring touching bare metal, a wire attached to the wrong location, and even corrosion can cause over draw on the circuit and blow that fuse. If it were to happen only when connected to a trailer then the short would be on the trailer side. You would have to check the trailer connectors to make sure they are clean and free of corrosion, check the wiring for any pinched, frayed, or otherwise damaged wires, and...
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  • Weak Trailer Brakes On Trailer Towed by Ram 3500 or Chevy 2500
  • Which brake controller are you using? What are the years of the trucks? If using factory integrated brake controllers you may need to adjust the gain (same on aftermarket controllers) to increase the output voltage. Trailer brakes work on varying voltages. At 4 to 5 volts that is not quite half of full power. At 12 volts the magnets would be fully energized. Also, where are you testing for voltage? Adjust the power output on the brake controller to the maximum and then have someone fully...
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  • Should Boat Trailer Lights Short Out When Backed Into Water
  • Water and electricity don't mix well. The best recommendation I can make for you would be to unplug your trailer wiring before you back your boat trailer down the ramp and then don't plug the lights back in until the trailer has dried out thoroughly. While the trailer lights themselves can be listed as waterproof or submergible the wiring of the trailer isn't always so that is why unplugging the trailer lights is recommended. If the assemblies were ever replaced water can easily get...
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  • Diameter of Hole Needed to Mount Bargmann 7-Way Super Sealed Connector # 50-87-004
  • You will need a 2 inch hole in order to mount the Bargmann 7-Way Super Sealed Connector, # 50-87-004. I have attached a diagram which illustrates the exact measurements of the connector.
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  • How Does Wire Attach to Pollak Single-Pole, Round Pin Trailer Wiring Socket
  • Single pole trailer connector # PK11851 accepts such large gauge wire that a set screw could work for holding the wire in place inside the connector. But it is designed so that you can solder the wire in. You can get a soldering iron kit fairly inexpensively just about anywhere that sells tools and/or craft supplies.
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  • Adding a 7-Way Trailer Connector and Brake Controller to a 1996 Chevy Tahoe with 4-Way
  • From what I could find the 1996 Chevy Tahoe does not have all the wiring run under the vehicle. Some models might have the blue brake output and orange or red wire for 12 volt power along the driver's side frame rail. But from what we found the wires are difficult to access. To add a 7-Way you would need to hardwire it in. I recommend the 4- and 7-Way installation kit # ETBC7. Your 4-Way will plug into this adapter and then you will just hardwire the remaining wires. White will need...
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  • Wiring Harness Recommendation for a 1995 Chevy C/K Pickup
  • The Pollack replacement 7-pole RV style trailer connector # PK11893 you referenced won't have any plug-in options available, but there is a couple options to consider for your 1995 Chevy C/K Pickup. First thing you will need to do is lower your spare tire because that is where you will find the tow package wiring if your truck came prewired, it will be taped up. If the tow package wiring is present, you can use the Pollak RV style connector socket with wiring harness # PK11898. You will...
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  • Brake Lights Do Not Work on Boat Trailer with 5-Flat Trailer Connector
  • If your 2013 Nissan Titan has a 4-pole flat wiring harness like # 119179 that you referenced but your boat trailer has a 5-pole flat connector like # 20017 you can still use these together but the additional circuit wire on the trailer (probably for an electric reverse lockout on the hydraulic coupler) will not be active unless you add a reverse light circuit connection from the Titan. This function would be on the blue wire on part # 20017. Step one is to check the vehicle harness and...
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  • Adding a 7-Way Trailer Connector on a 2007 Chrysler Town and Country for Trailer Lights Only
  • If you use a 4- to 7-Way adapter, such as # 37185, then you will just have the lighting functions on the trailer (minus reverse lights). On the adapter, you will have to ground the white wire to the vehicle frame, otherwise it will not work. The blue wire is for electric brakes which you said you do not need. The black wire is for 12 volt power if the trailer uses any. If those functions are not needed you can just cap off those wires and stow them out of the way. The last wire would...
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  • Recommended Trailer Wiring Harness For 2008 Mazda 3 With LED Lights
  • The trailer harness I recommend for your 2008 Mazda 3 with the LED lights is the Tow Ready Wiring, part # 119179KIT. This wiring kit includes the wiring harness, modulite install Kit, a circuit tester, and wiring connectors, and has a 4-pole flat trailer connector. This system protects your Mazda from electrical malfunctions.
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  • What Pins of a 7-Way Should have Voltage All the Time
  • The 12 volt accessory circuit of a 7-way should be run to the positive post of the vehicle battery through a circuit breaker so that sounds like it is wired up correctly. The back up circuit (if needed) should get run to the reverse light circuit of your 2009 Ford Ranger. It should not be active all the time unless your vehicle is put in reverse or if you wanted a second 12 volt accessory circuit and ran it to the positive post of the battery as well.
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  • Troubleshooting Trailer Wiring Kit On a 2011 Volkswagen Touareg that Blew Fuse and Stopped Working
  • What you will want to do is test the wires going into the box of the converter box for voltage with a circuit tester like the # 3808 to see if there is voltage going into the box when the taillight functions of your vehicle are applied, and then test the output side of the box to see if the current is making it through the converter. If not then the problem is that the converter box has shorted itself out and would need to be replaced. Before you replace it you will want to inspect the...
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  • Isolating the 12 Volt Circuit on a 7-Way Trailer Connector on a 2004 Chevy Silverado
  • The 12 volt wire on some Chevy and GMC trucks MIGHT not be connected under the hood. On others it is connected like it is supposed to be. There doesn't seem to be any obvious way to determine which ones are like this and why. Models that do not have it connected would need to have the 12 volt circuit hardwired. You could still use the isolator like you want but you will need to manually run a length of wire, # 12-1-1, from the front of the truck to the back via a 40 amp circuit breaker...
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  • Mounting Hardware for a Bargman 7-Way Super Sealed Connector with Cable
  • I recommend the plated steel mounting bracket # PK12711U-26 for the Bargman 7-way super sealed connector # 50-87-002 because it has ports for mounting a 7-way round or 4-flat trailer connector. The mounting holes are 2-1/4 inches eye to eye. See diagram I included. The mounting hole dimensions on the 7-way super sealed connector # 50-87-002 are 1-1/2 vertical eye to eye and 2-1/4 horizontal eye to eye. See picture. Take a look at the video reviews for each product if you would like.
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  • Tow Bar Wiring for a 2004 Jeep Liberty
  • There are special wiring harnesses used when flat towing a vehicle. The easiest way to integrate a 7-Way would be to use Blue Ox bulb and socket kit # BX8869. Then you could hardwire the included wiring to the 6-Way included with extension # RM-146-7. If you don't have to have a 7-Way at the front of the toad it would be a little easier. You could use TrailerMate harness # TM781104 which just plugs in line with the vehicle tail light wiring. Then you could just use a 7- to 4-Way adapter...
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  • Recommended 5-Way Connectors For Vehicle And Trailer
  • The vehicle side connector I recommend is the Pollak 5-Pole, Round Pin Trailer Wiring Socket, part # PK11502. Check out the product review video I have attached. You may want to take a look at the mounting bracket for the connector, part # 118137. For the trailer side I recommend part # PK11501. You can take a look at the attached product review video for this connector. I have also attached a helpful article that explains trailer wiring and has some diagrams and photos of how the...
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  • 7-Way Round Pin to 7-Way Blade Style Adapter
  • We have two adapters to go from a 7-Way round pin on a tow vehicle to a 7-Way blade style on a trailer. You could use either # PK12-724 or # HM47425. But the length is not close to 4 or 5 feet. What you could do is make an adapter. You would need 3 main parts: 7-Way round trailer side, # PK11702, 7-Way blade vehicle end, # PK12707, and 4 or 5 feet of jacketed 7-Wire, # DW04914-1. Just change the quantity on the wire page to the amount of feet you want.
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  • Troubleshooting 7-Way to 5-Pole Adapter with the Left Turn Pin Isnt Working
  • That's kind of an odd problem...does the left turn pin (9:00 position) in the 7-way function properly when the adapter isn't being used? Use a circuit tester like part # 40376 to ensure the trailer connector's been wired correctly. Activate the left turn signal, then test the pin in the 7-way for the left turn. If you're not getting a signal, use the tester on the wiring harness feeding the 7-way. If you're not getting power reaching the 7-way on that circuit, you likely have a blown fuse....
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  • Wiring Extension for Flat Towing a Vehicle Behind Monaco RV with 7-Way Trailer Connector
  • In order to determine the proper set up for your new towed vehicle (called a toad; the vehicle you will be flat towing behind the motor home) I would need to know the year, make, and model of that vehicle. Most of the tow bar wiring uses a 4-Way flat trailer connector with a few exceptions. Since your RV has a 7-Way trailer connector ideally you would use a cable that has a 7-Way on one end to plug into the RV and a matching connector on the other end for the tow bar wiring/lighting...
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  • Troubleshooting Trailer Brake Lights that Don't Function
  • First thing you should do at this point is test the 4-way of the wiring harness with a circuit tester part # 3808 for voltage on all of the right pins when the taillight signals are being applied. Just like in the video I attached. If the voltage checks out there but the trailer lights still don't function right then the problem is on the trailer wiring. That would mean that problem is either due to a ground issue or a short issue. Make sure that the trailer side connector are clean...
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  • Turn Signals but No Brake Lights on Trailer tail Lights
  • Any time a trailer has turn signals that work but not the brake lights it can be an interesting situation. This is because the brake lights and turn signals on trailer tail lights are on the same circuit. In this situation it is almost always a bad ground connection. 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...
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  • Troubleshooting Trailer Running Lights That Dont Work When the Rest of the Lights Do
  • In addition to the main ground, each tail light assembly at the back of the trailer must also have a ground. These are most commonly grounded to the trailer frame or through the bolts of the tail lamp assembly. I recommend checking to make sure that each light on the trailer has an adequate ground. Next I would check to make sure that both connectors, vehicle and trailer, are free of dirt and corrosion. If both are in good condition, I would move on to testing the vehicle connector....
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  • 5th Wheel Wiring Harness for 2000 Ford F-150 Extended Cab
  • Yes, you can add a second 7-way in your truck bed for 5th wheel towing while keeping your existing bumper-mount 7-way active. Curt harness # C56000 plugs in inline with the existing wiring leading to your 7-way. It allows that socket to remain active while adding the second 7-way in the truck bed for towing your 5th wheel trailer.
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  • Replacing Damaged 7-Way Trailer Connector and Wiring on a 2005 Chevy Silverado
  • To replace the 7-Way trailer connector on your 2005 Chevy Silverado with a 7- and 4-Way I recommend # HM40975 and wiring harness # PK11998. To determine how to wire up the harness to the truck wiring you will need to use a circuit tester such as # 3808 and have someone sit in the truck and run through the lighting functions will you test the wires. Then you can wire in the new harness by function. The wire function/colors for the new harness are: Red - Left Turn and Stop White -...
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  • Wiring Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector
  • You could wire the Tow Ready Adapter 4 Pole to 7 Pole # 30717 without the brake functions and just have the light functions on your tow vehicle without connecting the other wires. But I would be very cautious about not doing so for several reasons. The main reason is safety. The general rule for towing trailers with brakes is that if the Gross Trailer Weight is half of the Gross Vehicle Weight it is recommended to use a brake controller and have brakes on the trailer. Not being able...
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  • Troubleshooting Trailer Wiring When Running Lights Do Not Work
  • It sounds like there is a ground wire issue on your trailer. Since you said you checked the vehicle harness and it checks out we can rule that out as the issue. You will want to use a circuit tester like part # 3808 and check the wires coming out of the trailer connector when plugged into the vehicle. Make sure the pin for the ground on the trailer connector is not corroded or bent. Check the lights and make sure the ground wires are securely fastened to a clean bare metal surface, and...
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  • 7-Way and 5-Way Connector Recommendation
  • The closest thing we offer to what you are looking for is the part # HM48470. This will require you to remove your current 7-way and wire this one in it's place. Once installed it will provide you with a 7-way and a 5-way that can be used. Check out the videos I attached as well. Once shows a review video and the other an install video.
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  • Troubleshooting 12 Volt Accessory Circuit Not Functioning After 6-Way Connector Install
  • It is possible that you shorted out the 12 volt trailer wiring circuit of your truck while you were wiring in the connector. Since this circuit would have voltage all the time it would be pretty easy to short it out while wiring up a new connector. Check the fuse box for the 12 volt accessory trailer circuit relay/fuse and replace as needed.
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  • Troubleshooting a Vehicle that Trailer Wiring Stopped Working After Installing LED Taillights
  • The converter box of your wiring harness is looking for the amount of amperage on the circuits that is associated with incandescent bulbs. Since you switch to LEDs that draw considerably less the trailer wiring isn't functioning. You can either go back to your incandescent bulbs to fix the problem or you can install a different taillight harness like part # 119190KIT that is designed to work with LED taillights.
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  • Troubleshooting Trailer Running Lights Not Working on a Trailer
  • First thing you should do at this point is test the 4-way of the wiring harness with a circuit tester part # 3808 for voltage on all of the right pins when the taillight signals are being applied. Just like in the video I attached. If the voltage checks out there but the trailer lights still don't function right then the problem is on the trailer wiring. That would mean that problem is either due to a ground issue or a short issue. Make sure that the trailer side connector is clean...
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  • 7-way Round to 7-Way flat Adapter Recommendation
  • For a 7-way round to 7-way flat adapter you would want the part # PK12-724. For a 7-way extension that would give you 7 feet of extension you would want the part # C56080. If by chance your tractor has separate taillight wiring, meaning that the turn signals and brake lights run on separate pins, you will need to add a converter, like the Tow Ready, # 119130. Just cut off the 4 way end and wire it into this adapter. I have attached a picture which illustrates this. In order to...
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  • 7-Way Trailer Connector 12 Volt Circuit has Power All the Time
  • The 12 volt circuit on a 7-Way that was hardwired into a vehicle is going to have power all the time. Provided nothing is plugged into the 7-Way that draws power from the 12 volt circuit then it would not be a problem. The little LED light would take months to drain a vehicle battery if you were to let it sit all that time and never start the vehicle. But there is a way that you can shut off power to the 12 volt circuit when the vehicle is off. You would need battery isolation solenoid...
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  • Troubleshooting Trailer Lights That Go Off When 2011 Dodge Ram Is Put in Reverse
  • It sounds like the wiring on your trailer 7-way connector is wired incorrectly. Try using a circuit tester like part # 3808 and testing each pin on the trailer connector for function. If the pins on the connector are compared to the hands of the clock, the pin at the 1:00 position is the 12-volt accessory feed. This pin should show constant voltage. The pin in the 3:00 position should show voltage when the right turn signal and brake is activated. The pin in the 5:00 position carries the...
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  • Troubleshooting 2003 Chevy Tahoe that 7-Way Stopped Functioning
  • If the trailer wiring fuses of your 2003 Chevy Tahoe are good and the 7-way still isn't working properly the problem is either that there is corrosion on the 7-way that would need to be cleaned off with fine grit sandpaper or the wiring to the connector itself is damaged somewhere between the connector and the vehicle fuse block. Check out the connector, most likely you will either find damaged wires behind the connector or corrosion that needs to be fixed or there is corrosion on the...
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  • Can Unused Red Wire on Curt Trailer Wiring Harness Just be Cut Off
  • On certain applications, the red wire on Curt trailer wiring harness # 56146KIT does have to be grounded with the white wire since it isn't used in all applications. But you wouldn't want to cut it because that could potentially void its warranty. Since it is an input wire you are correct that it would not be hot (unless there was some sort of catastrophic short inside the converter box).
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  • How to Test Brake Switch to Find Circuit to Use for Brake Controller Installation
  • The easiest and most reliable way to determine which wire of your brake switch wire is the correct one to use is to use a circuit tester like part # 3808 to test all of the wires for voltage when the brakes are applied and none when released. It sounds like you are wiring up a brake controller so I attached a help article on brake controller hardwiring for you to check out as well.
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  • 7 way Round to 4 Way Flat Adapter Recommendation
  • The 7-way round style of connector that the # 47405 has is the same style that is typically found on tractor trailer type rigs. The issue you may run into is that the taillight circuits of your tractor are separate, meaning that the brake lights and the stop lights are carried on separate circuits. If that is the case just the # 47405 wouldn't work. If this is the case you will want the converter part # 119130 and a male round 7-way part # PK11700.
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  • Troubleshooting Trailer Running Lights Not Functioning After Boat Launch
  • Water and electricity don't mix well so I would imagine the issue you are having with the running lights of your trailer are related to your trailer being submerged in water when you launched your boat. First thing you should do at this point is test the 4-way of the wiring harness with a circuit tester part # 3808 for voltage on all of the right pins when the taillight signals are being applied. Just like in the video I attached. I suspect a blown fuse on the tow vehicle is to blame...
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  • What are the Functions of a 5-Way Flat Trailer Connector with 6 Wires
  • It sounds like you have what is called a wishbone harness like # A40W5B as an example. This type of harness will have 2 wires that share the running light circuit. This is so you can use two wires, one for each side of the trailer, for running light functions so you don't have to run a jumper wire from one side of the trailer to the other. The brown/yellow would be the left side and the brown/green would be the right side. Usually the green only is right turn signal/brake lights, yellow...
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  • Troubleshooting 7-Way Trailer Connector on 2003 Chevy Tahoe
  • Check that the harness that plugs into the rear of the trailer connector is pushed in all the way. I'd recommend using a circuit tester like part # 40376 on the wiring behind the trailer connector. If you're getting power on the harness but not on the trailer connector, the connector is faulty, damaged or corroded and would need to be replaced with a new connector such as part # HM40975. If you don't see any power on the harness, you'll need to check the fuse box under the hood. The...
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  • Heavy Gauge Trailer 4-Way Wiring, 16 Gauge
  • The longest 4-way harness we offer that has all 16 gauge wire is the Wesbar Harness part # W787274 which is 14 feet long. For one that is 30 feet long that has a 16 gauge ground wire and 18 gauge signal wires you would want the part # W002230.
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  • 2 Pole Wiring Connector Recommendations for Powering Winch on Trailer
  • That would be a great idea. We don't carry 4 gauge wire, but the # PK12801 2-pole connector would work great for what you are trying to do. For the male connector you would want the part # PK12800. The connectors are rated for up to 200 amps so you will need to make sure your winch doesn't draw more than that.
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  • Trailer Brakes Activate Every Time Turn Signal is Used
  • It sounds like you wired the brakes into the combined stop/turn signal circuit on the trailer. Trailers use what is called a combined system meaning that the brake lights and turn signals are on the same tire. So when you are using the turn signal the wire is energized and will apply the trailer brakes when the light blinks. To use the electrical trailer brakes you have to have a dedicated wire just for the brakes and you must use a brake controller in the tow vehicle. The most common...
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  • Can a Trailer Battery Be Charged through 12 Volt Circuit on Hopkins Coiled 7-Way to 6-Way Adapter
  • Trailer wiring on a vehicle or trailer can provide a maintenance charge only to a 12 volt battery (if it is a regular car type of battery) but the wiring is not heavy enough, nor are most vehicle alternators strong enough, to push back the amperage required to charge up a 12 volt battery. If it is a small breakaway battery then it can charge it up. So as long as the 12 volt circuit is working on the tow vehicle and the matching 12 volt circuit on the trailer side is connected to the...
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  • Recommended Trailer Wiring Harness for 1998 Holiday Rambler
  • Your 1998 Holiday Rambler shouldn't require a special converter but if the installation was completed per the instructions and this is the second unpowered converter that you have tried, I recommend trying a powered converter with circuit protection like the Tow Ready, # 119190KIT. With a powered converter the power is drawn directly from the vehicle's battery which virtually eliminates any draw on the taillight circuit.
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  • Will the Tow Ready 7-Way to 5-Way and 4-Way Trailer Adapter Work with a 2006 Volkswagen Touareg
  • The Tow Ready 7-way to 5-way and 4-way trailer adapter # TR20141 you referenced isn't recommended for the 2006 VW Touareg because it's the first generation, but I do have another option for you. Volkswagen made changes to the tow package starting in 2007 that requires specialized adapters. A comparable adapter would be the Optronics 7-pole to 5-pole flat # A75TB that would work for you. Another adapter that I recommend is the Hopkins multi-tow trailer connector adapter 7-way to 6-way,...
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  • How to Power Trailer Dome Light When Not Connected to Tow Vehicle
  • The only way you could power interior dome lights on a trailer without it being connected to a tow vehicle would be to power the lights with a battery like a breakaway battery. How you choose to wire up the batteries will in the end be up to you, but since breakaway batteries need to be charged up when you are towing I would be careful not to drain the battery with the dome light.
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  • How to Tow a Trailer with a 5-Way Round Connector with a Bike With a 4-Way Flat
  • Why is an interesting question for your situation. But most likely I would say the reason would be so that you could tow the trailer with your motorcycle? Since 4-way flat connectors are much more popular than 5-way rounds I would recommend you remove the 5-way and install a 4-way flat to match the one on your bike. For a 4-way you would want the part # 18004. Now since most likely your trailer has separate turn signals from the brake light you will need to use a taillight converter...
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  • Trailer Wiring Harness Recommendation for a 2002 Mercedes Benz M-Class
  • The Curt Wiring Harness part # 56146KIT that you referenced is a universal fit wiring kit designed to fit your 2002 Mercedes M-Class as well as the VW in the product picture. I attached an install video that shows this wiring kit being installed on a very similar M-Class as yours for you to check out as well.
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  • 7- and 4-Way Trailer Connector for a 2012 GMC Sierra 2500
  • Yes, Curt 7- and 4-Way # C57101 will plug into the same harness as the factory 7-Way on your 2012 GMC Sierra 2500 (though it will not fit in the same place). For a 7- and 4-Way without backup alarm you could use # 20119, # 30955, or # HM40975.
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  • Availability of Protective Cover for Wesbar # W787274 Trailer End 4-Pole Connector
  • We have exactly what you're looking for, part # W787301 which is compatible with the Wesbar # W787274 you mentioned.
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  • Availability of Trailer Wiring Harness for 2013 BMW X6
  • According to Tow Ready the # 119190KIT which was a fit for the 2013 BMW X5 would be compatible with your 2013 X6. I've confirmed this with my contact at Tow Ready. I've linked you to an install video showing the wiring harness being installed on a 2013 BMW X5. The procedure for your X6 would be similar. To complete your towing set-up, you might need the following: Ball mount, part # 2923 1-7/8 inch trailer ball, part # 19260 2 inch trailer ball, part # 63845 (The coupler on your...
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