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Trailer Wiring Harness

Make installing your trailer wiring harness as easy as possible with a custom fit wiring harness. Trailer wiring from Draw-Tite, Curt, Pollak, Tow Ready, Bosal, and Hopkins eliminates or reduces the need to cut and splice wires. It also helps to protect your vehicle's sensitive electronics from mis-wired trailers.

Choose the year of your vehicle to the left to find a custom fit trailer wiring harness.




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Custom Fit Vehicle Wiring Information Videos

Trailer Wiring Harnesses Troubleshooting

Today we are going to cover kind of a different subject. Basically, we are going to talk about getting your wiring installed and what is happening afterward. Okay, for instance, you went to the trouble to get your wiring installed, you plug it into your trailer, and nothing happens. There could be a lot of different things going on with it. First off, you need to figure out for sure whether it is on the towing vehicle side - the car or truck - or if it is something on the trailer. We will show you how to test the different types of wiring systems we have shown here. And that way you can tell for sure if it is your wiring harness or if it is your trailer.


How To Differentiate a Two Wire and Three Wire System

Today we are going to do the Frequently Asked Questions of what is the difference between a three wire system and a two wire system. It is actually very easy and very simple. All it is, is you take away two wires and the same thing applies to the four and five wire system. Starting off on the car side we are going to attach the wiring to, we are going to have five wires. Green is going to be right turn, red is going to be the brake signal, yellow is going to be left turn, brown is going to be your running lights, and the white is going to be ground. When you talk about the three wire system you are only talking about the right turn, the brake signal, and the left turn. You omit the brown wire and the white wire. That is our three. On the two wire system you are only dealing with the two combined signals, the brake signal and the turn signal on the same wire. We are only dealing with the left and right turn. 00:46


Trailer Wiring Harness Installation - 2006 Kia Sedona

Today were going to show you a popular upgrade. We have here a four pole flat that has been installed on a vehicle. The owner has a boat trailer now and it has a five wire flat. So were going to convert that four wire to a five wire flat. We will show you how to deal with part number 20036 which is the adapter itself, and the bracket which is part number 20046. Our first step we need to do is take off the four pole and then well uninstall the bracket and put in the new bracket. It may take some force, but you have to pull to get this out of here. We actually used a rubber mallet to tap it a little bit, now this bracket can come off which we have previously loosened up. Now well install our new bracket and it will go in the same spot as before. What were going to do next is get our four pole ready which we have cleaned out with WD-40 and then were going to put in some dielectric grease. Well put that inside here and then were going to attach our four pole from our adapter inside there.


Testing and Troubleshooting a Modulite Vehicle Wiring Harness

All right today we are going to go over how to check over a modulite as shown right here which converts a 5 wire to a 4 wire system. We are going to go over the basics which are really simple. Basically we are just going to test input into the modulite and test the output of the modulite. That will tell us one of two things, we have no input going into the modulite, that means there is something wrong on the car side of the connector, there is nothing wrong with the modulite. If you have power going into it, but nothing coming out then you know chances are it is the modulite or there is a problem on the trailer itself. When testing you always want to test these modulites or converter boxes without the trailer hooked up first.


T-One Wiring Harness Explanation

Today we are going to show you a little bit of wiring. Basically kind of like wiring 101 and what to look for when your going to hardwire into the vehicle. What hardwire means is actually getting to the wire and splicing into them to make a connection. T1 connectors are different. They actually have a connection point and harness which you take apart and fit the T in the middle of that. Now on this vehicle we will show you the typical wiring schematics and a couple variants from that. The typical connection point is like where this wiring comes into the back of the tail light and there is always going to be a connection point, almost always. Older vehicles, it would have just ran straight, but with pretty much of your newer vehicles you are always going to have a snap connection like this. Basically a T1 connector simply would just go ahead and fit in between this harness.


How To Troubleshoot a Modulite Demo

Today we are going to troubleshoot a modulite that is not really working so we will check it out and show you what to look for. This will apply to all modulites and this will also apply to converter boxes as well. The only difference being that it does not have a power wire for a converter box. The first thing we want to do is put a tester on the 4-pole just to make sure. We will hook up our ground to our ground lead and then we will turn on the left turn signal which we have going, we have got nothing. You can turn on the other signals and see what we have got, nothing here. Try the running light circuit, nothing here either. 00:28


Hot Lead Fuse Installation

Today on our 2005 Chevy Silverado, we are going to hook up the hot lead for the seven pull connecter at the back of the truck. To do this well simply remove the fuse box cover and the first position, on the first row is a blank fuse, we are going to remove it and install a 30 amp fuse. With that fuse installed, we can go ahead and replace the cover and were now hot at our seven pull connector. There you have it with the install of the hot lead fuse on our 2005 Chevy Silverado.




Custom Fit Vehicle Wiring Videos

Tekonsha Wiring 119147 Review

Today we're going to take a look at the Tekonsha Upgraded Modulite Vehicle Wiring Harness with the four-way trailer connector. Now this Modulite wiring harness will work with most vehicles that have the multiplex wiring systems for lighting. It will eliminate the draw on your vehicle's tail light circuit. This will work with either LED or incandescent bulbs on both the trailer or the vehicle. The tail light circuit has been upgraded to work with vehicles that use the pulse with modulation wiring system, so it allows the converter to turn on fully, giving trailer maximum light brightness. This does power the trailer's stop, turn, tail and running lights directly from the tow vehicle's battery. This may be used on two and three wire systems.


Curt Custom Fit Vehicle Wiring C56320 Review

Today we're going to be taking a look at the Curt T-connector vehicle wiring harness with the 4-pole flat trailer connector. This product fits certain years of the Ford Escape. It's going to provide a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights. This is compatible with 5-pole, 6-pole and 7-pole adapters. The adapters are sold separately. It's going to come with a dust cap that covers up those connection points when it's not being used.


Trailer Wiring Harness Installation - 2009 Ford Escape

Today on our 2009 Ford Escape we're going to take a look at and show you how to install the Curt T-Connector Vehicle Wiring Harness with the 4-pole flat trailer connector. Part number is C56160. The first thing we're going to do is remove our taillight housings here and we'll set them aside. We'll need a Phillips screwdriver and we're going to remove the screw here and here. We'll just kind of pull out and rearward at the same time. There's going to be two pressure tabs, you can see one here and here, that just kind of slide into those holes. Now let's remove our two plugs here.


Tekonsha Custom Fit Vehicle Wiring 118687 Review

Today we're going to be taking a look at the T-1 Vehicle Wiring Harness with a four pole flat trailer connector. This is going to fit certain years of the Land Rover Discovery. It's going to provide your full array flat connector at the back of the vehicle to power your trailer's signal lights. This is compatible with five pole, six pole and seven pole adapters. Adapters are sold separately. It's going to come with a dust capt that's tethered to the housing of the plug.


Trailer Wiring Harness Installation - 2016 Chevrolet Traverse

Today on our 2016 Chevrolet Traverse, we're going to be taking a look at installing the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package with a 4-Pole Flat Trailer Connector, part number C56245. Here's what it looks like once it's installed. You can see we're going to have a 4 flat connector with our water-tight cover to protect it when it's not in use. You can also use that to tie it to your hitch. Just place it through. Snap them back together.


Trailer Wiring Harness Installation - 2016 Chevrolet Traverse

Today on our 2016 Chevrolet Traverse, we'll be taking a look at and installing the T-1 Vehicle Wiring Harness for Factory Tow Package 4 Pole Flat Trailer Connector, part number 118270. This is what it's going to look like once it's installed. It's got a nice weather-tight cap, going to help protect our connections when it's not in use. One of the big features with this is it's going to plug into your factory 7 rate tow package so we're not going to have to run any wires to the front of the vehicle for a separate module light. It's going to use your factory wiring and your factory fuse panel. It's going to be a really quick install. You're going to access the plug inside your regular fender well.


Tow Ready Custom Fit Vehicle Wiring 118309 Review

Today we're going to be taking a look at the T-One vehicle wiring harness with a 4-pole flat trailer connector. This product fits a 2002 to 2005 Kia Sedona. It's going to provide a 4-way flat connector at the back of your vehicle to power your trailer's signal lights. This is compatible with 5-pole, 6-pole, and 7-pole adapters. The adapters are sold separately. It's going to come with a dust cap for the 4-way flat connector.


Trailer Wiring Harness Installation - 2015 Dodge Journey

Today on our 2015 Dodge Journey, we'll be installing the Curt T-Connector Vehicle Wiring Harness with four pole flat trailer connector. Part number C56109. First thing we're going to want to do on our Dodge Journey to install our wiring harness is open our hatch. Then, we'll remove our taillights. There's two plastic panel retainers on the inside here. We'll just pry off the middle section, and then remove the back section. With our trim panel tool we'll insert underneath the middle, pull it towards us, and we'll do the same with the bigger part.


Trailer Wiring Harness Installation - 2016 Jeep Renegade

Today we're going to be reviewing and installing the T1 vehicle wiring harness with 4-pole flat trailer connector, part number 118651 on our 2016 Jeep Renegade. All you do is open your trunk, open your little cargo hatch here, then right underneath there in the spare tire area where we keep this. You can run it right out over here, which is perfect. You can plug it into your trailer, but you want to be sure to avoid this area so it doesn't get pinched or anything, and could damage it and cause you some problems. If you keep it out over here, it should be nice and protected and form perfectly into this weather strip when you close the trunk going down the road. Then whenever you're done, all you do is take it, tuck it right back in there. Over here we've got the entire wiring harness, the T connector for the passenger side, T connector that goes behind the driver's side tail light, then here's the module that's in there.


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