Tekonsha T-One Vehicle Wiring Harness Installation - 2019 Chevrolet Express Van

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How to Install the Tekonsha T-One Vehicle Wiring Harness on a 2019 Chevrolet Express Van


Rob: Hey, everybody. It's Rob here at etrailer.com and today we're going to be taking a look at the Tekonsha T1 vehicle wiring harness on our 2019 Chevrolet express van. Now, our Tekonsha wiring is going to give us a four-pole flat trailer connector. It's one of the most common trailer connector aside from the seven pole connector, and our four pole is going to give us all of our light functions so we can safely and legally get down the road, like our tail lights, our turn signals and our stoplights. Trailer wiring is good for more than just trailer lights, there's a lot of accessories that go into our hitch that use lights, and most of them have a four-pole trailer connector on the back. It's a lot easier to plug into the trailer connector here than trying to splice into factory wiring, having to cut wires and deal with all that.But speaking of installation, that is the really nice thing about our Tekonsha wiring, there is no cutting or splicing of the factory wires, it's just going to use a simple T-connector that's going to plug in line with our tail lights and it's going to get the signals that we need sent out to our trailer.Now, our Tekonsha wiring is actually designed to stay on the inside of the van until we're ready to use it.

But we understand that a lot of people want it out here because it's a lot easier to get to and once you're hooking up your trailer, your connector is right there. We don't have to worry about opening the door or doing anything like that. So why don't we go ahead and show you how we get everything hooked up and how we got it to the outside so you can feel comfortable enough to do it at home.To begin our installation, we want to come to the back of our van and we want to open up both doors. Now we need to get access to the taillight connector. However, the connector is actually on the inside, it's not behind the tail light, so we need to remove these panels here.

Now they come out pretty easily, but you may need a trim panel tool, screwdriver or something just so you can get behind that edge and kind of pry it outward because there's some clips back there. So let's take a trim panel tool, and if you look, you can kind of see inside where the fasteners are to get an idea of where you need to pry so we're not just pulling on the plastic.We're going to try to get our trim panel tool by the clip itself, start prying away until we can get it to release then we'll pull this panel out. And once you get the clips loose on the back end, we can grab our panel, just kind of work it out. There will be some other clips kind of halfway holding it in. But again, we should be able to just grab the panel, kind of work it lose.

We'll pull it out and set it aside for now.Now, if you look inside there, there is some connectors. They do look very similar to the ones that are on our new harness, but this is not the connector we want. The connector we want is actually right in about this area. It's on the upper panel. So don't plug in the wiring harness to these down below, you need to break this panel loose, and again, there's just some clips.

Get our trim panel tool, loosen them up and we're going to have this panel. We don't need a fully remove, we kind of just swing it out of the way because we do have the seatbelt attached to it.So with the upper panel removed, this is going to be the connector for the tail lights. Now again, they look super similar, but we're looking for the one that has the green, yellow, and black wires coming out of the back, should be right next to the factory ground here. So first thing we'll do is we'll pull that orange tab out and we can press on the black center tab there and disconnect the connectors. A little tam, just squeeze it and we can pull that connector out. We want to grab the T-connector that has the yellow wire, it's also going to have a ring terminal really close to the connector, and you'll notice they're going to match the ones that are on our express van. So we just want to plug in female into the male and vice versa.Then we can take that orange tab and slide it back in place. In your kit, you're also going to get these green tabs. Those are for the T-connector side so we can have that locking tab put back in place. Now this ring terminal is our ground wire. Unfortunately, again, we have this ground that's right next to the connector. Just going to grab a 10 millimeter socket, pull that knot out and slide the bolt through our ring terminal. Make sure we keep our factory ground in place then we can reinstall the bolt.Now the other connector we have is going to be our green wire. This is going to be our passenger side signals so we want to run our wire along the back here. We're going to loosen these panels up just like we did on the driver's side and plug these in in the same location on the upper panel. Now for our green wire, what I like to do is just make sure you have enough slack so it's not being pulled on too hard and the connector behind this panel, then I'm going to take the excess wire that's running across.I'm actually just going to lift up slightly on this threshold and tuck the wire underneath. If you'd like, you can pull the panel up here, but there's a lot of clips and then we have to worry about if the wires are going to get pinched and if we can just tuck it underneath there, it'll be protected and we don't have to worry about it. Interfering with the panel when we go to put it in. We should work our way across tucking, all the excess wire underneath this panel, and then any other excess wire we can put over on the driver's side tied up behind everything.Now before we put our panels back in place, a lot of customers want the wiring to be close to the hitch on the outside. That way, once they hook up, they can just plug in their wiring. They don't have to open the doors, find the wiring and drape it out. So a quick, easy way to get the wiring to the outside without having to drill any holes, we come over to the driver's side. We already have a bundle of wire going through this grommet right here. So if we pop that grommet out, we can actually pull our four-pole through and then at least be to the outside of the vehicle.And we'll just grab the grommet and we can pull it through and we'll take our four-pole connector and I will let you know, it's a pretty tight fit, but we should be able to squeeze it through so we can get that wiring to the outside. Just want to be careful to not damage the terminals that are on the connector. Once we have the connector through, pull all the slack that I can get and start routing that out. And now this way we have a little bit of relief. We don't want to crush that wire against this edge. I'm just going to make a small cut on that grommet so I can slide the wire to the inside and then put the grommet back in place. Just to be very careful when you're cutting the wires or cutting the grommet, you don't want to cut the wires on the inside. We'll just slip it through and push that grommet back in place.So now we can take our four-pole connector and if we come straight down right from that grommet, we have a clear shot to the ground. So we can actually just drop our four-pole connector down, take the most of the slack with it, and there's actually a gap right here even when the door's closed, but I would like to protect the wire as much as I can. So I'm thinking I might tuck as much of the wire behind this weatherstripping as I can fit, that way I don't have to worry about the door damaging it. Just want to be careful not to push the weatherstripping off and just keep in mind that once we do have it tucked behind there, once it gets down to this bottom corner section, we're not going to be able to tuck it back because it does stop on that body edge. And there's nothing for it to grab on to.With our wiring at least on the outside, I'm going to start putting the panels back in. Just going to be very mindful of those clips, going to make sure they're actually lined up all the way. Don't force them because they can bend sideways and then they won't hold anymore.Now I'm just going to take my wiring and I'm going to actually going to route it kind of high going above all these cross members and everything else over this bumper structure, keep our wiring protected. I'm going to Go over the frame, I'm going to route it towards the receiver tube on my hitch. You're going to actually use the dust cover to hanging off our hitch where whenever we do want to use it, it's ready for us, but it's also not dragging the ground.Now I'm just going to take a little bit of time to tie up the excess wires so that they're not dragging down, but again, you still have a little bit of room so we can plug everything up. Now the final step of your installation is going to be testing all of our circuits and make sure they work properly. So I got my four pole tester here, we'll go ahead and run through the lights and verify that they are working. So if I turn on my headlights, we can see that my taillight function is working as well as the left turn signal, the right turn signal and my brakes and brakes and both turn signals. All we have left to do now is hook up to our trailer and hit the road. But again, I'm Rob here at etrailer.com and that'll finish up your look at the Tekonsha T1 vehicle wiring harness on our 2019 Chevrolet Express van..


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