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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


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.


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


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

Curt T-Connector Vehicle Wiring Harness Installation - 2011 Honda CR-V

Hi, I'm Shane with etrailer.com. Today you're going to be taking a look at and I'm going to walk through the installation of the Curt simple plug in vehicle wiring harness for your 2011 Honda CRV. This wiring harness is going to give us our four pole plug, brake lights, turn signals, and running lights. It's going to give us three amps per circuit for our stop and turn signals. Five amps per circuit for the tail lights, it's going to have a nice dust cap. It's going to help protect our wiring from dirt and debris.


Curt T-Connector Vehicle Wiring Harness Installation - 2010 Subaru Outback Wagon

Ryan: Hey, everybody. Ryan here at etrailer.com. Today on our 2010 Subaru Outback wagon we're going to be taking a look at and showing you how to install the Curt T-Connector Vehicle Wiring Harness. This is going to provide us with all the necessary lightning functions to not only remain safe and legal, but to also let other motorists know what our intentions are as we're going down the road.Our wiring is going to provide us with more than enough power to work with either incandescent or even LED lighting. It's going to have three amps per circuit for the stop and turn, and six amps for our tail light circuit. Now, one of the things I really like about this wiring kit is that it uses a module box.


Tekonsha T-One Trailer Wiring Harness Installation - 2015 Chevrolet Traverse

Ryan: Hey, everybody, Ryan here at etrailer.com. Today on our 2015 Chevrolet Traverse, we're going to be taking a look at and showing you how to install the Tekonsha T-One Vehicle Wiring Harness.Now, what sets this one apart from many of the others is the fact that it's plug and play. We're going to have our four-pole end on this side, and the other side is going to have a connector that'll plug directly into our factory tow package, as opposed to having to tap into our Traverse's tail lights and have to run a power wire all the way out front to the battery. It's going to provide us with all of the necessary lighting functions to not only remain safe but legal. And other motorists on the road will appreciate the fact that your lights work, and they're going to know your intentions as you're pulling your trailer.We're going to have a thick rubber dust cap that's not only going to help our terminals clean, but it also serves as a hanger. That way we could store our wiring outside on our hitch.


Curt T-Connector Vehicle Wiring Harness Installation - 2019 Kia Soul

Rob: Rob here at etrailer.com, and today you're going to be taking a look at the Curt T-Connector Vehicle Wiring Harness on our 2019 Kia Soul. Our wiring is meant to stay to live on the outside of the vehicle at all times, so it'll be real close to our hitch, so we can use it whenever we need to.The wiring is going to provide us with a four pole flat trailer connector, that way we have all the required lights to get down the road safely and securely, like our tail lights, turn signals, and our stop lights. And like most wiring kits, our wiring is going to have a duct cap to keep all the dirt and debris out, but it's also going to double as a hook so we can keep it on our safety chain loop, so it's not dragging on the group, take up some of the slack.Our wiring is going to make sure that it's legal when you're going down the road. Whether you have a trailer, a cargo carrier, even a step that has a light on it, this is going to be able to plug into that. Now our wiring is going to work with adapters as well, so if you have a four, five, six, or even a seven way connector, now the adapters will work, and you can find those here at etrailer.com.Now the way our wiring is going to get all the signals, is it's going to have a T-connector that's going to plug inline with our factory tail light, so it'll send those signals out. And then our wiring's going to have a converter box to make sure that it sends the proper signals out to the trailer.


Tekonsha T-One Trailer Wiring Harness Installation - 2016 Buick Enclave

Rob: Rob here at etrailer.com, and today we're going to be taking a look at the T-One vehicle wiring harness for factory tow package on our 2016 Buick Enclave.Now our wiring should provide us with all the lights we need to get down the road safely when we're towing our trailer. It's going to provide us the four-pole flat trailer connector and give us our brake lights, our turn signals, and our taillights.Everybody knows you need lights to legally take a trailer down the road so you don't get pulled over, you don't have a ticket. But there's a really big safety aspect to it as well. We don't want anybody running into the back of us because we don't have lights on our trailer. Or if we're changing lanes, we want to make sure that everybody knows exactly what's going on so we can all be safe.Now since our wiring is for the factory tow package on our Buick, it's going to make the installation that much easier. If we didn't have the factory tow package, it would involve a lot more work.


Review of Tow Ready Custom Fit Vehicle Wiring - Fifth Wheel and Gooseneck Wiring - 20110

Today we're going to take a look at the Draw-Tite 7-foot long Fifth Wheel Gooseneck Wiring Harness with the seven-way connector. Now, this is a custom fit part. It is designed to fit the 1997 and newer Ford F-150, F-250, F-350, and F-450 trucks; also the 1999 and newer Silverado and GMC Sierra 1500, 2500, 3500 trucks; also the 2009 and newer Dodge Ram and Ram 1500, 2500, 3500 trucks; and it also fits the 2004 to 2014 Nissan Titan trucks and the 2010 to 2016 Toyota Tundra trucks.Now, it will fit all those vehicles, as long as they have the factory seven-way tow package. And because it fits so many different vehicles, I do recommend for you to go to our website and use the fit guide. Put in your year model, vehicle, and it'll show you if this will work for your application.Now, this will provide this nice seven-way blade style connector in your truck bed for a nice hassle-free hookup of your fifth wheel and gooseneck trailers. The connector right here is what'll mount in your truck bed, sidewall, tailgate post, or wheel well and it will easily allow you to plug in the seven-way from your fifth wheel or gooseneck trailer to this connector, instead of having to try to make your connection all the way down by the rear bumper where the factory seven-way is.Now, when you do install this harness, it will retain that factory seven-way connector at the rear of the truck.


Review of Tekonsha Custom Fit Vehicle Wiring - Trailer Hitch Wiring - 118384

Today we're going to take a look at the T1 vehicle wiring harness with the 4-way flat trailer connector. Now, this is a custom fit part. It is designed to fit the 1999 and newer Chevrolet and GMC vehicles, but the 7-way factory tow package also fits 2004 and newer Nissan vehicles, also with the 7-way factory tow package. Because it fits so many different vehicles, I would 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 T1 wiring harness will plug directly into the back of your factory installed 7-way connector so that you can retain that factory 7-way but also pull a trailer that uses a 4-way flat. Provides this 4-way flat connector at the back of your trailer to power the trailer's single lights. And as I mentioned, it does retain the functionality of the factory installed 7-way RV connector.


Review of Tekonsha Custom Fit Vehicle Wiring - 4 Pole Flat - 118801

Today we'll be taking a look at the T-1 vehicle wiring harness with a four pole flat trailer connector. This is going to come with everything you need to get your trailer wiring installed on your vehicle and that's going to give you your four pole connection at the back of your vehicle to hook up to your trailer. This is going to give us our stop, turn, and tail functions so we'll be able to signal with our trailer if we're turning right or left, our brake lights will come on and our running lights will also be functioning when we have our lights turned on in the evening or in inclement weather.We'll have our two connections to make behind the tail lights. Those are just plug and plays. We don't have to worry about any kind of splicing or soldering into our vehicle's electrical system. They just plug right in to the factory connectors.


Tekonsha ZCI Circuit Protected Vehicle Wiring Harness Installation - 2016 Mercedes-Benz Metris

Shane: Hi I'm Shane with etrailer.com. Today you're going to be taking a look at, I'm going to walk you through the installation on the Tekonsha ZCI wiring kit for your 2016 Mercedes Benz Metris.This wiring kit, the nice thing about it and what separates it from others is we don't have to tap into any factory wiring. It basically is going to come with plugs that or brackets that what you do is you lay the wire inside of it. You clip it over the top and it reads the signal running through it. We don't have to splice into anything. The wiring's going to give you all of the proper lighting functions you need to pull a trailer so that you're safe and legal.


Articles about Custom Fit Vehicle Wiring