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Trailer Wiring

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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


Curt Wiring C56190KIT Review

Today we're going to take a look at the CURT Powered Taillight Converter Kit with the 4 way flat trailer connector. Now this is a custom fit part, it does fit many vehicles so what I would recommend is to go to our website, use out fit guide. Put in your year, model, vehicle and it will show you if this will work with your application. This will provide this 4 way flat trailer connector at the back of your vehicle, part of your trailer signal lights. It will ensure that your vehicle's wiring will match that of your trailer. It is designed to work with 2 wire and 3 wire electrical system.


Trailer Wiring Harness Installation - 2013 Chrylser 300

Today on our 2013 Chrysler 300 we will be installing the Curt T-Connector Vehicle Wiring Harness with 4 Pole Flat Trailer Connector, part number C56145. When we want to use the wiring we'll just take some out of the trunk like so so we can make our connection to the trailer. Make sure we avoid the latch here and close the trunk on over it. This will keep it secure and it'll be easy to use. When you're done towing your trailer you open the trunk back up, lift up on the spare tire cover panel and store your wires just like so and have full access to your trunk; you don't have to worry about snagging the wire on anything. Here's what comes in our wiring harness package. We have our control module here, which will prevent any voltage being back fed into the vehicle's wiring harness.


Trailer Wiring Harness Installation - 2013 Ford Fusion

Today on our 2013 Ford Fusion, we're going to be taking a look at, then showing you how to to install the Tow Read T-One Vehicle Wiring Harness with the 4-pole flat trailer connector. Part number is 118574. You'll see our 4-pole wire here. This is something that we'll be able to bring right over the rear of the vehicle here. You can see that nice cushion area there. That's going to provide an area for our trunk to shut. That will protect the wire.


Tekonsha Custom Fit Vehicle Wiring 118711 Review

Today we're going to be taking a look at the T1 Vehicle Wiring Harness with a 4 Pole Flat Trailer Connector. This product fits certain years of the Hyundai Elantra. It's going to provide a 4 Way Flat Connector at the back of the vehicle to power your trailer's signal lights. This is compatible with 5 pole, 6 pole, and 7 pole adapters. Adapters are sold separately. It does come with a dust cap for the 4 way flat plug.


Trailer Wiring Harness Installation - 2013 Cadillac SRX

Today on our 2013 Cadillac SRX. We're going to be taking a look at and installing the Curt T-connector vehicle wiring harness with 4 fold flat trailer connector. Part number 56096. This is what it looks like once it's installed. This is going to be a very simple install. It's going to plug into a factory plug that already on the back side of your bumper.


Trailer Wiring Harness Installation - 2016 Acura MDX

Today on our 2016 Acura MDX we're going to be taking a look at and installing the T-1 Vehicle Wiring Harness with a 4 Pole Flat Trailer Connector. Part number 118628. Here's what it's going to look like once it's installed. This is going to provide you with a 4 flat trailer wiring to allow you to tow most of your smaller trailers. It is compatible if you wanted to add an adapter to change it from a 4 flat to a 6 or 7 way connector. The power module light is going to reduce stress on your vehicle's wiring system.


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