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Expert Answers about Wiring


  • LED Trailer Wiring Set Recommendation for Replacing Lights with 3 Wires
  • The Miro-Flex LED Tail Light Set # TLL28RK would be a great choice for you as they are an LED trailer taillight set that uses three wires. The white is ground, the brown is taillight, and the yellow is for left stop/turn and the green right stop/turn. I attached an install video for these lights for you to check out as well.
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  • 4-Way Trailer Wiring Harness Recommendation for a 2006 Saturn Vue
  • Since your 2006 Saturn Vue has separate turn signal circuits from the brake lights you would not be able to hardwire a 4-way directly to the taillights like with the part # 18004 that you referenced. Instead you would need a harness that has a converter built into it so that the circuits are adapted to what a 4-way requires. For that we have the part # 118418 which is a confirmed fit and would work well. This plugs in line with your vehicle taillight harnesses and does not require...
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  • Troubleshooting Brake Controller that Stopped working with Brake Pedal on Chevy Silverado
  • The problem is the red wire of your brake controller. It isn't connected to a circuit that sees 12 volts of power when the brakes are applied. Since your truck is a 2009 Chevy Silverado this would mean that the problem is most likely a blown CHMSL fuse. An easy way to test this theory is to check to see if your third brake light is working. If it's not the fuse is the problem.
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  • Could Trailer 7-Way 12 Volt Accessory Circuit Charge Boat's Battery
  • The 12 volt accessory circuit of a trailer 7-way connector is commonly used to put a maintenance charge on trailer batteries. There really is no reason you couldn't run the wire up to the battery of your boat instead. If the battery is smaller in size it might actually put a decent charge on it too. The big thing will be to come up with a way to disconnect the charge wire from the boat before backing it into the water.
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  • 7-Way Plug and Lead Recommendation for a Trailer that has a 5-Way Installed on It
  • So you have a tow vehicle that has a 7-way connector on it and then a trailer that has a 5-way? What you would need to do is remove the 5-way wiring and install a 7-way with a lead like part # HM20048 which is a 7-way with 11 feet of harness. I attached a picture that has a diagram that has how a 7-way normally wires to a trailer.
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  • Are Connectors On Either End of 50-67-210 Identical or a Mirror Image of Each Other
  • The contacts one each end of the Bargman # 50-67-210 are exactly the same. This item is intended to be used if your trailer connector would not be able to reach your tow vehicle. You can plug in one end on your trailer and plug the other end into your tow vehicle.
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  • How to Locate Stoplight Circuit for Installing Brake Controller in a 2014 Toyota Sienna
  • You will need to use a circuit tester like part # 3808 to test all of the wires leading to the brake pedal switch until you find the one that carries 12 volts only when the brakes are applied and none when released. I attached an install video for a brake controller on an older 2005 Toyota Sienna to show you what the process is like.
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  • Troubleshooting No Brake Lights on Trailer when Towing with a Motorhome
  • It sounds like you have separate tail lights on your motor home. Meaning that the stop/tail lights are not on the same bulb as the turn signals, and that your current wiring is set up for combined tail light wiring. We have a converter that will need to install onto the wiring of your motorhome so that the signal will be split appropriately. You would want a Vehicle to Vehicle Taillight Converter # 118158. To wire it in you will need to take the right turn/stop circuit and run it...
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  • Is Using a Brake Controller Necessary for Towing a Trailer
  • If the trailer is equipped with electric brakes and you want them to actuate, you'll need a brake controller. A brake controller is a fairly small investment that will go a long way to keep you safer when towing. There are two types of controllers, the older time-delayed variety and the newer proportional type. I'd recommend going with a proportional controller like the Tekonsha Primus, part # TK90160. A proportional controller can sense how quickly the tow vehicle is braking, and...
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  • Trailer Right Blinker and Brake Light Not Working when Connected to a 2015 Ram 2500
  • The issue you are describing 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 but can show up any time. 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...
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  • Trailer Brakes Don't Work w/2008 Silverado but Other Trailers Work and Other Trucks Work w/Trailer
  • It sounds like there is a short somewhere because you should not be getting fluctuating voltage readings. Usually this is caused by a dirty/corroded trailer connector and/or a loose wire. Make sure the truck and trailer side connectors are clean and free of corrosion inside where the wires attach and outside on the pins. While inside the connectors you can check for loose connections. Every vehicle's tow package wiring is different and sometimes a trailer function will work with one...
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  • Troubleshooting 6-Way Trailer Wiring Where Trailer Brakes Lock Up when Trailer is Plugged in
  • For your trailer with a 6-way there are actually two common ways the 6-ways can get wired up. The only difference is that the brake output circuit and the 12 volt circuit are swapped. Since your brakes are locked up currently all you need to do is swap those two circuits and the wiring should be correct. What means is swap the circuit in the 2:00 and center position. That will fix your problem. We see this issue pretty regularly and the solution is always just swapping the two circuits.
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  • Adding 4-Pole Flat Trailer Connector to Motorhome
  • We don't offer a plug and play type adapter that would do this, but you could add a 4-pole flat connector using # 18002. You'd simply tap the 18002 into the wiring feeding the existing 4-pole. Instead of the quick-connectors, I'd recommend using butt connectors like # DW05744-10 instead, this would make for a more secure connection. The 18002 would wire to the existing wiring feeding the round 4-pole connector color for color.
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  • Availability of 6-Way/4-Pole Trailer Connector
  • I don't have a plug-in adapter available, but I do have some solutions that would provide you with a functional 6-way and a 4-pole. Option one would involve removing your existing 6-way and installing part # 37175. Cut the 4-pole plug off the 37175 and wire it as follows: Blue - for electric brakes Red - for auxiliary or hot lead White - for the ground Yellow - left turn/brake lamp Green - right turn/brake lamp Brown - running lamp Or, you can completely remove your existing...
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  • Running Lights Will Not Work on a Big Tex Gooseneck Trailer
  • The first thing we need to figure out is if the problem exists on the truck or trailer. To do this you will need a circuit tester such as # 3808 or a meter if you have one. Disconnect the trailer from the truck and have someone sit in the truck to operate the running lights while you test the connector at the back of the truck. The running light circuit should be the pin in the 1 o'clock position on a vehicle side 7-Way connector. If there is power on that pin then the issue is on the...
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  • How to Make 7-Way to 6-Way Square Adapter for Jayco Camper
  • To make a 7-way to 6-way square adapter will require you to get the part # 37995 to use the 6-way end and then wire up a 7-way to it like part # H20043. This will give you the adapter you would need since there isn't one already pre-made.
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  • Recommended Wiring Upgrading from 4-Way 119178kit to 7-Way for Bypassing 2006 Dodge Ram Pickup TIPM
  • You are correct, you will need the # ETBC7 kit to upgrade your 4-way to a 7-way for your 2006 Dodge Ram 2500. We actually have a specific FAQ for your vehicle to install a brake controller, see attached, you'll want to go to starting from scratch after step 2. For a brake box, also known as a brake controller, the Primus IQ proportional brake controller # TK90160 (1 to 3 axle trailers) is growing to a customer favorite. I have linked an installation video of this brake controller for...
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  • Only Running Lights are Working on Trailer with Multi-Tow Adapter
  • To find the solution to your problem you may need to check a few things. Your 2013 Nissan Armada needs to have two relays for your left and right turn signals and brake lights # C57000 in order for them to work so you will need to check these. There's a video attached of the Trailer Wiring Harness Installation - 2010 Nissan Titan. If you watch this video and skip forward to 1:17 it will show you the relays and where they are. If you do not have them you will need to get some. If...
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  • Would the 4 and 5-Way Pins of the # 37385 Both Be Active at the Same Time
  • Yes, the 4-way and 5-way pins of the part # 37385 will both be active when the adapter is plugged into a 7-way. You could use both at the same time.
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  • Trailer Brake Lights Not Working on a 1999 Chevy Silverado 2500
  • It could just be a fuse on your 1999 Chevy 2500. Check the owner's manual and fuse panel lids to see if there is a separate fuse for trailer brake lights. It could also be a stop light or CHMSL fuse that is blown. If Your 1999 Chevy is an actual Silverado and not a C/K series with the Silverado trim then it will have separate turn signal circuits from the brake lights (1999 was a slit year so there were both C/K series and Silverados which is the name Chevy started using for their trucks...
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  • How to Install Curt Trailer Wiring Harness in 2015 Lincoln MKT
  • To install the Curt 4-pole wiring harness installation kit # 56146KIT that fits your 2015 Lincoln MKT you will access the vehicle wiring behind the two taillight assemblies. The pigtail wire leads that exit the converter box's left side attach to your car's stop, turn and running light wires using the included quick-splice connectors. You will also make a ground and 12V+ power connection. I have linked an installation video showing this kit installed in an earlier model year Lincoln...
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  • Recommended 7-Way to 5-Way or 4-Way Flat Adapter That Measures 3-Ft Long
  • For a 7-Way to 5-Way or 4-Way Flat connector I recommend part # HM47075. This adapter will work with a 4-way or a 5-way and has Nite-Glow which lets you know you are connected and working. This has a coiled cable which measures 3-ft when stretched.
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  • Does the Prodigy RF Brake Controller Need Brake Output and Reverse Lights Circuits to Work
  • Since you are using the Prodigy RF brake controller # 90250 you will only need to have the 4-Way plugged into the adapter, the white wire grounds to the vehicle frame, and the black wire needs to have power because that is where the RF gets its power. The blue and yellow wires on the adapter, # C57674, will not be used for the RF. But if your trailer has an electric reverse lock out then you would have to attach the yellow wire to a reverse light wire on the vehicle The black wire...
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  • 7-Way Wiring Harness for 2008 Ford F-150
  • The 7-way wiring harness kits offered for your 2008 Ford F-150 are shown on the linked page and all include both the wiring harness portion and the trailer connector as well, such as PK11893-11932 from Pollak and Tow Ready # 20119. Both of these use a standard round U.S. Car connector. The part you referenced, # 118247, uses two OEM connectors and is a fit for 2004 model year trucks but not for your 2008 F-150.
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  • Replacement 7-Way Trailer Connector and Wiring Pigtail for 2013 Ford F150
  • I'm not sure what you mean by harness clips, but the # HM40975 will work as a replacement for the existing 7-way on your 2013 Ford F150. If the US car connector that plugged into the back of your existing 7-way has been damaged, then you can cut off the existing US car connector and wire on the # PK11998 pigtail. The pigtail wires are color coded as follows: Red - Left Turn and Stop - 14 gauge White - Ground - 10 gauge Blue - Electric Brakes - 12 gauge Green - Right Turn and Stop...
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  • Parts Needed to Install a Brake Controller in a 1999 Dodge Ram
  • For your 1999 Dodge Ram 1500 that does not have any trailer wiring at all you would first want to start with the part # 118329 as it is a 4-way like what you referenced but it is a custom fit harness designed to specifically work on your vehicle. The one you mentioned is a universal kit that could work but would be much more difficult to install. 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...
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  • Adding a 7-Way Trailer Connector and Brake Controller to a 2005 Ford E-150 Van with 4-Way
  • I have seen 4, 5, 6, 7, 9, 12, and 13 pin trailer connectors but never an 8 pin connector. Are you sure it is an 8 pin and not the regular blade style 7-Way such as # H20044? If it does not look like this please send me a picture of the trailer's connector so I can determine what it is. If it is indeed a regular RV style 7-Way then we do have the parts to add a mating 7-Way to your 2005 Ford E-150 van. You will need # ETBC7 to add the 7-Way, retain the 4-Way, and have the wiring needed...
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  • 4-Way Harness Recommendation for a RV and Custom Fit Tow Bar Wiring Harness for 2013 Honda Fit
  • The 4-way harness part # 56146KIT that you referenced is going to allow you to install a 4-way on your motorhome. The # TM783104 is a tow bar lighting solution confirmed to fit your 2013 Honda Fit. The 4-way of this kit will attach to the 4-way of the # 56146KIT and will allow your RV to control the taillights of the Fit. If you wanted to use the part # HM47605 to mount the 4-way at the rear of your RV you certainly could do that as well.
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  • Recommended European 7-Way Round to 4-Way Flat Wiring Adapter for 2006 Porsche Cayenne
  • It sounds like you will instead need the Tow Ready # 118710. This plug adapter will fit into the 7-way round European-style trailer connector with recessed sockets and adapt it to the 4-way flat you desire. The only catch is that this harness will only work for combined wiring so you will want to check your factory harness by testing the pins with a circuit tester like # 40376 to see if both the brake and turn signal are carried on the same pin. If they are then this adapter will work...
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  • What Voltage and Amperage Should Trailer Brake Magnets Have
  • It depends on what the brake controller output is set to. If you have the brake controller set to the maximum then there should be about 12 volts at the brake magnets. To see if the brake magnets are drawing the correct power set the brake controller to maximum and have someone apply the manual override on the controller while you test the magnets with a meter such as # BTMT15. For 10 and 12 inch brakes: 2 brake assemblies should have 7.5 to 8.2 amps at 12-13 volts 4 assemblies should...
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  • Taillight Converter for Motorcycle Towing Trailer with Combined 4-Pole Wiring
  • Since trailer lighting is typically configured with stop and turn signals carried on the same wire, you will need to install a taillight converter on the motorcycle to combine those signals before they reach the trailer lights. You can use kit # 119178KIT which includes a circuit tester, quick-splice connectors and the converter itself with a 4-pole plug. The wiring configuration will be as follows: Cycle LEFT turn goes to yellow wire Cycle RIGHT turn goes to green wire Cycle BRAKE...
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  • Fifth Wheel 7-Way Recommendation for 1999 Chevy Truck
  • Sounds like you are looking for a 7-way that you can install in the bed of your truck so that the connector of your fifth wheel can easily connect to it. For a 7-way to install in the bed of your truck to make connecting your trailer lights easier you would want the part # 41157. Most 7-ways will be at the rear of the truck near the bumper which doesn't work will with fifth wheel hitches. This kit installs in line with the 7-way at the rear of your truck and gives you a second one to...
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  • Is 16 Gauge Wire Adequate for Trailer Wiring for Lighting
  • Most trailer wiring that runs to trailer lights is 16 gauge. I would rather people use 14 or 12 unless the lights are LED which draw considerably less. But for most people 16 gauge works just fine for basic trailer lighting. If you are planning on running several running lights or just more lights in general you would want thicker wire. I attached a help article on trailer wiring for you to check out as well.
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  • What Do Abbreviations EB and XL Mean on Trailer 7-Way
  • EB would stand for electric brake on a trailer connector. This is the circuit that carries voltage to the brake assemblies of the trailer. XL would be auxiliary and is typically a 12 volt power circuit used for lights or maintenance charge on a trailer battery.
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  • Trailer Brake Lights Not Working After Installing New 7-Way on 2003 Dodge Durango
  • If the brake lights are not working but the turn signals are then you may have a blown stop light or CHMSL fuse on your 2003 Dodge Durango. Check the owner's manual for the fuse locations and for tow package fuses to check to see if any are blown. The tow package wiring on the Durango is already converter so the tail light wiring won't have anything to do with the trailer connector wiring. But if you really wanted to you could use # 118334 that plugs in line with the tail light wiring...
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  • Trailer and Tow Vehicle Brake Lights Not Working when 7-Pin Trailer is Connected to 4-Pin Vehicle
  • On both a 7-Way and 4-Way trailer connector the brake lights and turn signals are on the same circuit so it is strange that the brake lights aren't working. But, brake lights draw more constant power than the running lights or the turn signals so it could be a situation where the trailer lights are causing to much power draw. The first thing I recommend doing is using an adapter to connect the 7-Way on the trailer to the 4-Way on the tow vehicle. You can use # 37185. You will plug the...
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  • Troubleshooting Curt C56175 4-Pole Trailer Wiring Harness Installation on 1990 Mazda MPV Van
  • There are two Curt 4-pole wiring harness fits for your 1990 Mazda MPV Van, the part # C56175 that you purchased (thank you) and the powered-type unit # C59236 which can deliver higher current output of 5- and 7.5-amps per circuit. Harness # C56175 is not recommended for use with cars that have LED-type lighting because such high-efficiency lights use much lighter-gauge wiring and this light wiring can sometimes prevent enough current from flowing to the trailer lights. The powered harness...
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  • How to Make an Adapter to Go From European 7-Way to American 4-Way
  • Basically there is no easy way to convert the European 7-Way to a US 4-Way. We do not carry any kind of adapter that you could use. You are left with 2 options. First, you would install a separate wiring harness which would be the easiest. Or, you could attempt to fabricate an adapter. You would need to use a converter, # RM-732. The red wire on the input side would attach to the brake light wire on the vehicle wiring. The white wire grounds to the frame. The yellow wire will attach...
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  • Trailer Wiring Harness Recommendation for a 1998 Ford Crown Victoria
  • For your 1998 Ford Crown Victoria we have the Hopkins trailer wiring harness part # 46255 as a confirmed fit that is designed to work with the taillight circuitry that your vehicle has.
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  • Replacement 7-Way with Wiring and Mounting Bracket for 2000 Dodge Ram 2500
  • We have exactly what you would need. You would want the Pollak 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring # HM40975-11998 this comes with wiring needed to attach to your vehicle's wiring plus a bracket for attaching to your truck.
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  • Solution for Trailer Wiring on 2007 Dodge Durango that Has Separate Circuit 7-Way Installed
  • Your tow vehicle has a 7-way wired with separate trailer wiring circuits which is not a standard way to wire up trailer wiring. Unless you have a specific trailer you plan to tow with separate wiring you would want to convert the trailer wiring on the tow vehicle to match the standard combined circuits you see on 99% of trailers. The adapter you would need is the part # RM-732 which would wire to the vehicle's 7-way circuits. I attached a diagram of a 7-way for you to use as a guide...
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  • Troubleshooting Brake Controller And Trailer Brakes That Lock Up
  • There is a long list of possible issues you can check out. First, are the hubs really hot and could that be due to a lack of grease? That could cause the brake to stick as you described. If that is not the issue you may have a short somewhere. You can test the brake output pin with a circuit tester like part # 3808 and it should only show power with the manual override. To test for the amount of voltage you are getting you can use a meter like part # BTMT15. If it shows power any other...
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  • Adding a 4- or 7-Way Trailer Connector to a 2017 Chrysler Pacifica
  • The trailer wiring harnesses for the 2017 Chrysler Pacifica do not require identifying the tail light wires and splicing in a harness. There are a couple of options depending on the trim level of your Pacifica. If you have a Limited model use # 118712. And if you have an LX or Touring model use # 118723. Both of the above harnesses are 4-Ways. To add a 7-Way you would first need to install one of them. Then to add a functional 7-Way, retain the 4-Way, and to have the wiring for a brake...
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  • Adding a 7-Way Trailer Connector to a 2005 Dodge Ram 1500 with Factory 4-Way
  • In order to add a 7-Way to your 2005 Dodge Ram 1500 that came with a factory 4-Way you will need to use a 4- to 7-Way adapter such as # 30717. The white wire will ground to the truck frame. The black wire is the 12 volt power circuit you will need to supply power to the trailer battery. The black wire will need to connect to the positive battery terminal on the truck. You will need some wire and a 40 amp circuit breaker. For wire you can use # 12-1-1 which is sold by the foot. I recommend...
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  • Could Tow Ready 119190 Trailer Wiring Wire in as Replacement for 56146
  • I would have to recommend you stick with the Curt or go with the # 119190 as those are the two that are most commonly used. The # 119190 tends to be a bit more reliable so that would be the route I would go.
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  • Brake Controller and Install Harness Recommendation for 2004 Dodge Durango
  • You need to have a brake controller installed in your 2004 Dodge Durango to be able to control your trailer's brakes. The stop light signal wouldn't be a safe way to apply the trailer brakes as they would just lock up immediately. A brake controller applies the brakes in a safe controlled way for safe stopping. For a brake controller I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling brake controller because of how well it works and how easy it is...
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  • Possible Way to Wire Up 7-Way to a John Deere 4430
  • Does your tractor have standard taillight functions like stop light and turn signals? What signals do the two wires carry? I am assuming one is ground but not sure what the other would be. What you would need to do is use the part # 119190KIT to tap into any available taillight circuits so that you could give yourself a fully functional 4-way. From there you would use the part # 37185 to convert it to a 7-way. Or, if you have trailer brakes that you need to operate you would need part...
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  • How Would Reverse Light Install on a Boat Trailer
  • You would need to have a reverse light circuit ran to your trailer to power reverse lights. If you have a 5-way flat or 7-way trailer connector currently then that circuit is already present. If you have a 4-way harness then you would need to install the part # 20036 on your tow vehicle to allow you to have that circuit. The # BUL78CB is a white light that would work well for this. For more info on trailer wiring and where to find the reverse light circuit on common trailer connectors...
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  • Recommended 6-Pole Trailer End Wiring Plug Connector to Accept 12 Gauge Wire on Trailer
  • I would recommend you get the Pollak 6-pole # PK11604 for your trailer connector. This trailer end connector accepts up to 12 gauge wires. You should not be trimming the 12 gauge wires to fit into a 14 gauge plug because the power draw will still be more than the plug is rated for and may limit the power or not work properly. What you will want to do is snip off past where you stripped the wire and then wire up this Pollak connector # PK11604. This will be the best solution for...
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  • Troubleshooting Left Brake Signal Not Working on 2016 Lark Trailer and 2003 Chevrolet Silverado
  • To begin troubleshooting your trailer wiring, we will first want to determine if the issue is originating on your 2003 Chevrolet Silverado or on your 2016 Lark trailer. Using a circuit tester, such as # 40376, you can test the pins on the 7-Way at the back of your Silverado to ensure the connector is functioning properly. It is easiest to test if you can have a buddy help, so that one of you can sit in the cab of the truck to activate the turn signals and brake pedal while the other...
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  • 4-Pole Wiring Harness for 2002 Damon DayBreak
  • For a 4-pole flat wiring harness for your 2002 Damon DayBreak built on a Chevrolet Workhorse chassis, you can use Tow Ready Kit # 119178KIT. This kit includes the powered converter, a circuit tester to help you identify the wires for connection and the quick-splice fasteners. This harness will combine the separate stop and turn functions on the 4-pole output side. These combined signals will be carried on the green and yellow wires, right and left respectively.
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  • Recommended Wiring Harness for a 2015 Lincoln MKT
  • A powered module is required to safeguard the vehicle's wiring and support the trailer lights. On your 2015 Lincoln MKT you have a combined wiring system, which means the brake and turn signal are sent on the same wire. The MKT also has light-gauge wiring because of the LED lights. I recommend the # 119147KIT for your vehicle, because we have had better luck with Draw-Tite wiring harnesses than Curt ones. I have linked this wiring harness and the hitch to this page for your purchasing...
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  • Is Hopkins Endurance Multi-Tow 7-Way RV and 4-Way Flat Trailer Connector Durable
  • I have attached a photo of part # HM40950 you can check out. As you can see in the photo the arrows are pointing to the hinges used on the connector are more heavy-duty than the strap and hinge on the 40955 you currently have. We have not had customers complain about the durability of this connector and it should work well for you.
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  • Adapter Recommendation for Harley TriGlide to Tow Trailer with 5-Way
  • While there isn't an adapter available I can tell you how to make one. You will need a wiring converter like the part # RM-732, a 4-way to plug into your Harley wiring like part # HM48110 and a 5-way to the trailer like part # HM47900. On the input side of the converter you will need to match the yellow and green colors from the # HM48110. On the output side of the converter the yellow and green wires will match up to the yellow and green of the # HM47900, the red wire from the...
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  • What Voltage Protector Should be Used on Trailer with 50 amp Plug Using 30 amp Plug Adapter
  • If your trailer is rated for 50 amp service then that's what the appliances are rated for as well. The idea is to protect them and since they would be drawing up to 50 amps the 30 amp protector would potentially cause problems. For that you would want the part # CAM55306.
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  • Why Would Plug-N-Tow (R) Short Proof Powered Taillight Converter Fail
  • Trailer shorts often times take out the converter boxes like the 46365 that you have. Most likely something shorted out and damaged it. The boxes are designed to fail like this though as a way to protect the vehicle wiring. Basically you would will to go over your trailer wiring looking for any shorts from cut or exposed wire, fix as necessary and then replace the converter.
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  • 2015 Honda Odyssey Transmission Cooler and Hitch Recommendation for Cargo Carrier
  • For a transmission cooler for your 2015 Honda Odyssey the Derale part # D13503 is going to fit and work well. It is pretty large at 11" Wide x 8-3/4" tall x 7/8" deep but we installed it on a 2013 Odyssey and found that it worked well. I attached the install video that shows this. You are correct in the routing of the fluid through the cooler as well. For a trailer hitch I would recommend the Draw Tite hitch part # 75270 as it is a confirmed fit and does not require the use of a stabilizer...
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  • Re-Wiring 7-Way RV Style Trailer Side Wiring Connector
  • I can certainly help you re-wire your trailer-side 7-Way connector. Thanks for the photo of your connector, it helped verify the style connector and which wires you have! The attached wiring diagram will help you in attaching the wires back to your connector. Based on your photo, the only wire you don't have is the Blue wire that would be for the Brake Controller Output/trailer brakes signal. The Green wire should carry the Tail and Running light circuit, Black is 12V power, Yellow is...
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  • Converting Wiring On 1998 Ford Ranger From 4-way To 7-Way For Trailer
  • We have what you need to convert your wiring from 4-way to 7-way to match your trailer. You can cut the round connector off on the vehicle side and replace it with part # HM48035. Then you need to use part # ETBC7. Your 4-way flat will plug into the # ETBC7 and you will need to run the additional wires. You will need to attach the white wire from the # ETBC7 to a clean bare metal surface for a ground. The blue wire will go to your brake controller. The purple wire is used for reverse...
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  • Which Circuit Does Brown Wire of Curt Powered Tail Light Converter # C59236 Connect To
  • The brown wire of the Curt Powered Tail Light Converter # C59236 that you referenced would attach to the running light circuit.
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  • Will Hopkins Multi-Tow Trailer Connector Adapter # HM47675 Fit a 2013 GMC Yukon XL
  • The Hopkins Multi-Tow Trailer Connector Adapter # HM47675 that you referenced would fit and work well in the 7-way of your 2013 GMC Yukon. As long as all of the circuits are functional on the 7-way this adapter would fit well.
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  • 7-Way to 5-Way Extension Adapter for Boat with Surge Brakes
  • Actually the part # 787207 that you mentioned would be the perfect solution for you to use. The 7-way of the adapter will plug into the 7-way of your truck and then the coiled extension will give you 4 feet of extra wire to attach to the 5-way of your trailer.
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  • Trailer Wiring Harness Fit for 2005 Audi Allroad Quattro
  • We have a number of trailer wiring harness options for your 2005 Audi Allroad, but the wiring harnesses are all hardwire options that will need to be spliced into your vehicle's factory wiring system. Unfortunately none of our manufacturers offer a plug-in wiring harness to fit the factory connector you referenced. To provide a 4-Way flat connector on your Allroad, I recommend installing the Upgraded Heavy Duty Modulite Circuit Protected Vehicle Wiring Harness with Install Kit # 119190KIT....
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  • Troubleshooting No Turn Signals on Trailer Towed by 2015 Nissan Frontier
  • If the factory 4-pole trailer wiring on your 2015 Nissan Frontier is not providing turn signals the issue could have several causes. It is possible the factory/dealership did not install the required relays in the Frontier. We offer the relays by themselves as part # C57000 and as part of a complete wiring harness kit # 118525. You could also have a blown fuse in the power distribution box; this you can check by taking off the lid and finding the fuses related to trailer lights. Check...
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  • What Parts Needed to Convert 4-Pole Connector on Tow Dolly to Match Motorhome Connector
  • If your tow dolly uses a 4-pole trailer connector this means it has only stop/turn/tail lights, but not electric brakes. If your Class A motor home uses a connector like # 37995 you can simply wire in the trailer-side part of this item in place of your existing 4-pole. This will provide a more reliable long-term connection than an adapter. Adapters are definitely convenient, but the additional contacts they introduce can cause connection issues if corrosion or contaminants get in. Wiring...
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  • Parts Needed to Add a 7-Way Trailer Connector to a 2012 Audi Q7
  • Yes, you can add a 7-Way trailer connector to your 2012 Audi Q7. The first part you will need is a 4-Way wiring harness. I recommend # 119250KIT because with it you will not have to cut and splice into the vehicle wiring to install it. Then to add a 7-Way (and the wiring to also add a brake controller) you will need # ETBC7. If the trailer has electric brakes I recommend the P2 # 90885 because it is easy to set up and use and it is reliable. I have included some links that show and...
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  • Wiring Functions of Curt Trailer Wiring Harness for a 1997 Lexus ES 300
  • When installing the Curt trailer wiring harness # 56146 or # 56146KIT the red wire is for the brake lights. Your 1997 Lexus ES 300 has a separate wiring system. This means that the turn signals and brake lights are on different circuits/bulbs. The yellow wire is for left turn signal, green is for right turn signal, red is for brake lights. And of course brown is for running/tail lights and white is the ground. There are some vehicles that would require grounding that red wire but not...
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  • How to Clean Rust/Corrosion from Frame Weld Nuts on 2008 Toyota RAV4 for Hitch Installation
  • I suggest you try a brass tube brush and a healthy dose of WD40 or PB Blaster on your rusted weld nuts. We also offer a wire brush # DW00254. You may need to use multiple applications of the lubricant, and allow time for it to soak in overnight, before using the brush. If you use a tap you could alter the fit of the hitch hardware which could affect the hitch's actual capacity, so I recommend using the lubricant/brush several times. Please refer to the linked video and article on hitch...
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  • Installation Instructions For Tow-Ready Wiring Harness For 2016 Chevrolet Malibu
  • I have attached a link to the installation instructions for the # 119190KIT kit for you. I have also attached a page form the instructions that shows the color and function for the wires included in the kit you can check out.
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  • Where to Wire two Brown Wires on Trailer Wiring to 4-Way
  • The brown/green and brown/yellow wires on your trailer are for the same running light circuit. You would need to run them both to the brown wire of the 4-way.
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  • Parts Needed to Install Brake Controller in a 2011 Honda Odyssey with 4-Way
  • I can help you pick out the parts you need to install a brake controller in your 2011 Honda Odyssey but there isn't a plug in adapter available for your vehicle. You would need to start with a 4-way (if you didn't have one). For that the # 118521. 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. I attached installation instructions and an install...
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  • Dimensions of Pollack 7-Pole RV-Style Vehicle End Trailer Socket
  • I was able to go out to our warehouse and take a few measurements for you which I've attached to this page for you to better see. The # PK12707 measures side to side, the holes are 2-1/4 inches apart on center. Top to bottom they are 1-1/2 inches apart on center. The diameter of the socket at the widest point it just under 2 inches (1.956 inches) so it will fit into a 2 inch diameter hole. The length from the back of the mounting surface to the back end of the socket is 3-5/16 inches...
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  • Troubleshooting Trailer Wiring When Some Lights Fail To Work
  • It sounds like a ground problem on your trailer. You can check everything out by using a circuit tester like part # 3808. First check the output form your vehicle to make sure a signal is getting through the connector. If that checks out move to the trailer side. Use a 12V battery with the circuit tester and start at the trailer connector. Look for corrosion or broken wires and correct as needed. If your trailer is aluminum or a tilt trailer the ground is known to be an issue. If...
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  • Plug-In Trailer Wiring Harness for a 2016 Mazda 3 Sedan without LED Tail Lights
  • For a 2016 Mazda 3 Sedan without LED tail lights you can use # HM11141824 which plugs in line with the vehicle tail light wiring so you won't have to splice wires like you would with some of the other options. I cannot recommend using a wiring harness that the manufacturer states not to use so it would be best to replace the harness you have with # HM11141824.
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  • Wiring Small Trailer With 4-Way Connector To Match Towing Vehicle 4-Way Wiring
  • My best recommendation is to first make sure the brakes are not needed on the trailer. If you find that is the case you can cut off the 7-way connector on the trailer and just use the 4-way wiring for the turn, running, and brake lights on the trailer. If brakes were put on the trailer by the manufacturer there may be a requirement for the trailer. If the brakes were installed by the owner then you may be right that they are not needed. I recommend using part # HM48205. This comes with...
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  • Why Would Stoplight Circuit Wire on 2010 Chevy Silverado for Brake Controller Not have Voltage
  • Under the dash of your 2010 Chevy Silverado the wire that would have the brake signal for the red wire of a brake controller would be either light blue or orange in color. If the wire you have found is dark blue it would be for the blue wire of the controller and would not ever see voltage unless wired to a brake controller. If the wire you have found is the correct stoplight circuit wire you would need to check the CHMSL fuse as that would be the most likely blown one. I attached...
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  • Mounting Hole Dimensions On RoadMaster 6-Wire Trailer Connector
  • The center-to-center distance of the mounting holes on the RoadMaster 6-Wire Trailer Connector, part # RM-910030-7 is 3-3/4 inches. The mounting holes can accommodate up 1/4 inch bolts when installing.
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  • Recommended Installation Screws for 1/2 Inch Metal Loom Clamp # A0500
  • For the Metal Loom # A0500 you will want to use the self-tapping screws like the part # FA1131822. The nice thing about this screw is that it doesn't require a pilot hole, just line it up and let the drill bit end of the screw do the work for you. This threaded screw will secure your loom clamp securely on your trailer. I have linked the above mentioned products to this page for your purchasing convenience.
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  • Why Would Trailer Turn Signals Stop Working When Headlights are On
  • Try improving the connection of the main ground wire of the trailer wiring harness. Make sure it is attached to a clean metal surface. Or you can run all of the trailer wires back to the main ground. This is actually the ideal solution. But you can also check the current grounds for the lights to make sure they are making a solid connection to a clean metal surface. What you described is the classic insufficient ground scenario so finding a way to improve the grounds will fix the problem.
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  • Can 2 Trailers be Connected to Both a 7- and 4-Way at the Same Time on the Same Vehicle
  • Provided that the combined power draw of all the lights from both trailers does not exceed the capacity of the tow vehicle's tow package wiring then you could make a 35 foot long 4-Way extension. However if you notice that the lights are dim you may think about switching to LED lights which require less power. What I recommend is to use # A35W42B, which is 35 feet long. This is a trailer end connector so on the opposite end you would need to attach a vehicle side 4-Way, # HM48190. Please...
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  • Troubleshooting Trailer Running Lamps Not Working After Replacing 7-Way Trailer Connector
  • To determine if the problem lies in the vehicle or the trailer wiring, use a circuit tester like # 40376 on the pin in the 11:00 position on your 7-way while the vehicle headlights are on. If the pin shows voltage on it, the problem exists somewhere in the trailer wiring. If you don't get any power on that pin, the issue is with the wiring on the vehicle. If the running lamps on the vehicle aren't working, check fuse # 17 in the fuse box under the driver's side dashboard. If they are...
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  • Is Blue Wire of 7-Way Wiring Needed to Install and Use Prodigy RF Brake Controller
  • Yes, you are correct the blue wire is not needed on a 7-way to use the Prodigy RF part # 90250. All you need is the black wire of the 7-way to provide power for the controller. The blue wire from the vehicle to the trailer carries the brake output signal from a brake controller. So there wouldn't be a need for the RF if you already had signal on this circuit.
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  • 4-Way to 7-Way Adapter Recommendation for Towing 2002 Coleman
  • What you need is a 4-way to 7-way adapter. The part # 30717 would work, or you could use the part # 37185 which is similar but comes with a mounting bracket for the 7-way. I would recommend cleaning that 7-way though! Otherwise you may not get all taillight functions to work. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller. This kit comes with everything needed to wire up the 7-way and install a brake controller. For a brake...
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  • Can Wire Torn from Factory Wiring Connector be Reinstalled on 2006 Ford Expedtion
  • It sounds like the blue wire on the factory connector tore off of the round connector that plugs into the back of the 7-Way trailer connector. I have a solution for you, but unfortunately we do not know of any way to install a new wire into the factory connector. The best solution I have for you is to cut off the existing round connector and install a replacement harness and connector, # PK11998. This replacement connector will need to be connected to the existing wires on your 2006...
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  • 7-Way Recommendation for a 2009 Toyota Sienna
  • You would first need to start with a 4-way if you do not have one. For that you would want the part # 118304. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller. This kit comes with everything needed to wire up the 7-way and install a brake controller. For a brake controller I would recommend the Prodigy...
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  • License Plate Recommendation for a Small Trailer Towed by Motorcycle
  • Most likely yes, but you would have to check with your local DOT to confirm that. An easy light to use would be the part # LPL31CB. This would tie into the running light circuit of the trailer's lights and would light up the license plate.
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  • 7-Way to 4-Way Adapter Recommendations
  • If you have a blade style 7-way you would need the part # PK12716 to convert it to a 4-way. If instead you have the less common 7-way round you would want the part # 118709.
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  • Solution for Trailer Brake Controller that Activates with Vehicle Hazard Lights
  • What you need is the part # 5501. This adapter is designed for your exact application. It will allow your hazards to illuminate and function without activating your brake controller each time the lights come on. I attached a diagram that details how it installs as well.
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  • Trailer Hitch and 5-Way Wiring Harness Recommendation for 2011 VW Touareg TDI
  • You are on the right track with the Curt Hitch part # C13116 but I have a wiring solution that will be easier to install. I would first recommend you start with the part # 118668 as it is a custom install harness designed to fit your vehicle that won't require any hardwiring. This will give you the 4-way functions without any hardwiring. Now to convert this to a 5-way you will want the part # 47515. This plugs into the 4-way and allows you to hardwire in the 5th circuit to the reverse...
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  • 7-Way to 5-Way Adapter Recommendation for 2008 Hummer H3 Towing Boat Trailer
  • The adapter you need is the part # A75TB which will convert the 7-way of your H3 to a 5-way so that you can connect to your trailer with a 5-way and all of the circuits needed will be active.
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  • What Size Wire Loom Is Recommended for Trailer 7-Way Wiring
  • For a wire loom for 7-way wiring we recommend 1/2 inch diameter like part # 459075-1 that is sold by the foot. I have a 7-way adapter on my desk that has a wire loom on it that is 1/2 inch so I know this size would be correct.
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  • Where Does Fifth Pin of Trailer 5-Way Run to Activate Reverse Lock Out Solenoid
  • Sounds like you are trying to activate a reverse lock out solenoid on a surge brake trailer so that it can back up freely. The fifth pin that is the furthest from the jacketed ground pin is the fifth circuit to use. This circuit would need to tap into the reverse light circuit of your tow vehicle. I attached an install video for the 5-way adapter part # 47515 that shows this process on a 2014 GMC Acadia.
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  • Universal Trailer Wiring Harness For 1998 Range Rover
  • The Universal Wiring Harness w/ ModuLite and Brake Controller Harness, part # 22550 is designed as a hardwire kit that pretty much includes everything you need to install a 7-way trailer connector on your Range Rover. The module protects your vehicle wiring and gets its power right from the battery instead of drawing power through the vehicle wiring which means no stress on the vehicle wiring. I recommend using a circuit tester like part # 3808 and test the wires on your vehicle to...
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  • How Do Trailers Maintain Ground Connection from Tow Vehicle
  • A trailer will use the vehicle's ground on the 7-way (or 4-pole), usually carried on the white wire, for its lights, brakes, etc. As you look at the vehicle 7-way socket (please see the linked photo) the ground is usually carried on the pin at the 7-o-clock position. It should not be necessary to make any ground connection to the hitch itself. In actual use the coupler/hitch ball connection does provide a degree of grounding for the trailer, but this will not be enough for all of the lights,...
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  • What Applications is the Flex-Coil Adapter part # 47015 Designed for
  • The Flex-Coil Adapter part # 47015 that you referenced is designed to plug into a trailer 7-way and convert the trailer wiring signals to a 4-way flat connector. As long as your truck has a 7-way (it would look like part # 37185) and your trailer has a 4-way this adapter would work well.
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  • Trailer Wiring Harness Recommendation for a 1990 Mazda MPV Van
  • You will have to use a converter style trailer wiring harness like part # C56175 which is a confirmed fit for your 1990 Mazda MPV. There will be no way to directly wire a 4-way to your van since it has separate turn signals and trailer wiring requires the signals to be converted to combined.
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  • Recommended Universal Wiring Harness for Trailer and Vehicle
  • Yes, you are correct the # A10-4225VP is a 25 foot length of wishbone 4-way wiring for the trailer with a trailer connector. A good universal harness for your vehicle is the # 119190KIT. The cost's of each item are listed on each page. I have linked both to this page for your purchasing convenience.
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  • How to Make 12 Volt Accessory Circuit of 2015 Silverado 3500 High Country Only Active With Key On
  • For some vehicles with factory 7-ways the circuit is only active when the key is on. Most however are on all the time. If the 7-way was hardwired to the vehicle then it will be on all the time unless an isolation solenoid was installed like part # TR118665. Basically this gets wired inline with the circuit and the center pin, when wired to a power source that is only active when the key is on, will activate the circuit so that the 12 volt accessory circuit would only get activated when...
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  • Adaptor for Going From 7-Way Blade to 5 or 4-Way Flat
  • Sounds like you are looking for the part # A75TB which is a 7-way blade adapter to a 4 or 5-way flat. I attached a review video for more info on it as well.
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  • Why Isn't There Specific Install Instructions for the Tow Ready Wiring Harness part # 119190KIT
  • I wish we had vehicle specific install instructions for the # 119190KIT that is a fit for your 2015 Audi Q5, but since this is a universal wiring kit we only have instructions that describe the process of what it would take to install this kit. Basically you would need to test the wiring of your vehicle taillights so that you can wire up this harness accordingly. I attached an install video on a somewhat similar vehicle that shows you the process.
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