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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.

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Custom Fit Vehicle Wiring Information Videos

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.


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


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


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.


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

Review of Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - 56094

Today we're gonna take a look at the Curt-T connector vehicle wiring harness with the four way flat trailer connector. Now, this is a custom fit part. It is designed to fit the 2010 to 2017 Chevrolet Equinox and GMC terrain vehicles and on a custom fit part like this, I always like to recommend for you to go to our website, use the fit guide, put in your year, model, vehicle, and it'll show if this will work for your application. Now, this harness will provide a four way flat trailer connector at the back of your vehicle to power your trailer's signal lights.It is compatible with five pole, six pole, and seven pole adapters. We do sell those separately. It does come with a nice set of detailed instructions that will describe how to install everything, with even pictures of where your connection points are.


Review of Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C56158

Today we're going to take a look at the Curt T-Connector vehicle wiring harness with the four-way flat trailer connector.Now this is a custom fit part. It is designed to fit the 2012 to 2016 Honda CRV vehicles and on the custom fit part like this, I always like to recommend for you to go to our website, use the fit guide, put in your year, model, vehicle, it'll show you if this will work for your application.Now this harness will provide this four-way flat trailer connector at the back of your vehicle to power your trailers signal lights. It is compatible with five-pole, six-pole, seven-pole adapters that we sell separately. This harness does connect very quickly and easily. Basically what you'll do is go to the rear cargo area of your vehicle and on the driver's side you'll locate the connection point for this T-connector. There'll be a connector in there that you'll just need to pull apart and then insert this T-connector in between that.


Review of Tow Ready Custom Fit Vehicle Wiring - Trailer Hitch Wiring - 118243

Today we're gonna take a look at the Ford replacement OEM tow package, seven way wiring harness. Now, this is a custom fit part. It is designed to fit the 1999 to 2001 Ford super duty trucks with the OEM four way flat wiring. Now, this kit will allow you to upgrade your four way on your vehicle to this seven way connector. Now once you do install the seven way connector, the four way that is on here will not be functional anymore. You can also use this if you have a factory seven way on your vehicle that might be damaged.


Review of Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C56217

Today we're going to take a look at the Curt T-connector vehicle wiring harness with the four-way flat trailer connector. Now, this is a custom fit part. It is designed to fit the 2008 and newer Toyota Highlanders, and on a custom fit part like this I always like to recommend for you to go to our website, use the fit guide, put in your year and model vehicle, and it'll show you if this will work for your application.Now, this kit will provide this four-way flat trailer connector at the back of your vehicle to power your trailer's signal lights. It is compatible with five pull, six pull, and seven pull adapters that we do sell separately, and this kit does connect very quickly and easily. There's no cutting or splicing of wires. Basically you just have two harnesses here to connect.


Review of Hopkins Custom Fit Vehicle Wiring - Trailer Hitch Wiring - HM40975-11998

Today, we're gonna take a look at the seven-way and four-way trailer connector socket, with the mounting bracket and wiring harness. Now, this dual seven-way and four-way trailer connector helps eliminate the need for an adapter, and allows you to tow a trailer with either a seven-way or a four-way plug. The connector is a high impact ABS plastic construction, uses a stainless steel spring for easy cover operation. You can see when you open the cover and release it, it'll pull the cover right back down. Same way on the four-way side.Has rubber gaskets on the inside of the covers. You can see right here for the four-way, and then right over here for the seven-way, so when it does seal it, it provides a nice weather resistant design, to keep the elements from getting to your connections.


Review of Hopkins Custom Fit Vehicle Wiring - Trailer Hitch Wiring - HM40975

Today we're going to take a look at these seven way and four way trailer connector socket with mounting bracket. Now this seven way and four way trailer connector eliminate the need for an adapter, allows you to tow a trailer if you need a seven way connection or a four way connection. The socket back here will connect to your vehicle's OEM wiring harness and it mounts with this included metal bracket. It's made of a high impact ABS plastic construction, on the cover as you can see they use a stainless steel spring for easy cover operation. You can see as you open it up and let it go it springs right back in place and they do use rubber gaskets. There's one there and on the four way there's one right there.


Review of Tekonsha Custom Fit Vehicle Wiring - Trailer Hitch Wiring - 118800

Narrator: Today we're taking a quick look at the Tekonsha T1 Vehicle Wiring Harness with 4-Pole Flat Trailer Connector.This is gonna allow you to safely tow your trailer or operate any other device that has that 4-Pole connection. It gives us all our lighting functions that we need. We'll have our running lights, stop and turn for both the right side and the left side, as well as our ground connection.It comes with a little dust cap to go over those terminals, make sure that no dirt or debris can go in there and cause any corrosion. Something I also like to do with the excess 4-Pole wiring, if it's hanging out the back of your vehicle you can actually kinda tie it up with this little attached piece here. It helps to just act as a quick little wiring connector.And then we'll have our module box itself. Now this is gonna be kind of the brains of the operation.


Review of Tekonsha Custom Fit Vehicle Wiring - Trailer Hitch Wiring - 118554

Today, we're going to take a look at the T-One Vehicle Wiring Harness with the Four Way Flat Trailer Connector. Now, this is a custom fit part. It is designed to fit the 2007 to 2012 Dodge Nitro vehicles and the 2008 to 2012 Jeep Liberty vehicles. And on a custom fit part like this, I do recommend for you to go to our website, use the fit guide, put in your year and model vehicle, and it'll show you if this'll work for your application. Now, this harness will provide a four way flat trailer connector at the back of your vehicle to power your trailer's signal lights. It is compatible with five pull, six pull, seven pull adapters that we do sell separately on our website.


Best 2019 Audi Q7 Trailer Wiring Options

Hi there Audi owners. Today we're going to be looking at the best vehicle wiring options for our 2019 Audi Q7.Here we have our two best wiring options. The option on the left is the one from Curt. And the option on the right is the one from Tekonsha. And in most svac's these wiring harnesses are going to be basically identical but there are a very minor differences between them and we'll cover those now.This is our Tekonsha harness, and as you can see, the module is relatively small which is nice to be able to fit it into smaller areas. Versus our Curt here, which is quite a bit larger.As you can see here on our 2014 Audi Q7 we've got the smaller Tekonsha module installed and we're able to take our wiring and tuck it all up into the little compartment behind our tail light.


Best 2019 Audi Q7 Trailer Wiring Options

Hi there Audi owners. Today we're going to be looking at the best vehicle wiring options for our 2019 Audi Q7.Here we have our two best wiring options. The option on the left is the one from Curt. And the option on the right is the one from Tekonsha. And in most svac's these wiring harnesses are going to be basically identical but there are a very minor differences between them and we'll cover those now.This is our Tekonsha harness, and as you can see, the module is relatively small which is nice to be able to fit it into smaller areas. Versus our Curt here, which is quite a bit larger.As you can see here on our 2014 Audi Q7 we've got the smaller Tekonsha module installed and we're able to take our wiring and tuck it all up into the little compartment behind our tail light.


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