Tekonsha T-One Vehicle Wiring Harness Installation - 2018 Chevrolet Equinox

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How to Install the Tekonsha T-One Vehicle Wiring Harness on a 2018 Chevrolet Equinox

Speaker 1: Today on our 2018 Chevrolet Equinox, you're going to be taking a look at and I'm gonna show you how to install the Tekonsha T1 Vehicle Wiring Harness for four pole flat trailer connector, part number 118750.This is going to provide us with all the necessary functions for our trailer. Our brake lights, our running lights, both turn signals and our ground. It's also going to come with a provided dust cap. This is going to help protect our connections from dirt and debris and moisture. One great thing about the attached dust cap is that when you're not using it, you can wrap it around and use the dust cap as a holder to help keep your wiring off the ground.Another great thing about this wiring is it has a converter box. What that converter box does, it's going to protect your factory wiring in your vehicle from any back feed from your trailer and vice versa.

If there's a problem with the wiring it's going to protect the wiring either way.Now that we've gone over some of the features of our wiring, let me show you how to get it installed. First thing we're going to do is we need to remove our taillights. You can use a plastic trim panel tool or you can use a small flat heat screwdriver, we need to pop these little caps off. You're going to take a T-15 Torx bit and you remove those two screws. Remember that if you just kind of wiggle it like this and you're going to pull it straight back, but if you kind of hit back on it like that, it'll help break these loose out of here.

Once you get it out, you're going to take these two harnesses off. You're going to push down on that tab and pull out. This one you want to push down on that gray section right here, like that. You're going to do that same thing to the other side.Your wire's going to be coming up behind our fascia here. There's a couple different ways to do it.

You can use an airline tube, wire hangers, wire hanger's a little hard to come by anymore. Another simple way is anything that has a little weight on it, you can see here, we've got a nut with a piece of string, use kite string, anything like that. You can even use a wrench that has a closed end on it. You're going to take it and drop it, just like that, to where it comes out of the bottom. Then to make it easy on yourself, go ahead and connect your black wire that you're going to be running up to the battery to the black wire coming off of your converter box.We'll go ahead and strip back.

We're going to add on our heat shrink butt connector. Cut it down, then we'll add the black wire coming off our converter box. We're going to take a heat source and shrink up our butt connector. Now we'll take the side with our yellow wire, we'll take this white end right here and take our nut that we got in there and what we're going to do is just pinch the wire a little bit and feed it through the nut. You can take either one of these just to kind of keep it in place. We'll go ahead and pull our string up. Just like that. All we're going to do is we're going to match our ends. This is going to be our T that's going to go back into our taillight. Plug it in, plug that back in in place and we can reinstall our taillight.Now we need to find a place to mount our converter box. Your kit's going to come with two-sided sticky tape. You can mount this. There's not really anywhere on this side to mount it. We have this steeler 00:04:18 stuff all along this edge. We can go right here. What I'm going to do is I'm actually going to zip tie it right to this existing wiring. So I'll take one of our zip ties in our kit, just like that. You'll have a hole right in the end of your converter box. Zip tie it there. Then I'll throw a couple more around it just like that, maybe one on the wire end here. That'll help hold it in place.Next we need to mount our grind wire. Needs to be on a metal surface. We can do it anywhere in here. I think I'm just going to do it right there. We'll take our self-tapping screw, 1/4" socket, just like that. Give us a good ground. Next we need to route our green wire over to our passenger side, our four pole to the center. Let me do that real quick and I'll show you how I did it.I took my four pole wire and the green wire going over on my passenger side and I ran over the top of my bumper beam here. You can see as it tied to the existing wiring. Got my four pole wiring right here to the center of the vehicle. My green wire, went across, did the same thing on this side with it, went over top of my bumper beam here. Now I'm going to hook it up to my string and my bolt or my nut and pull it up and attach it the same way I did on the driver's side.I'm going to run my power wire up to the front of my vehicle to my battery. Let me get that done real quick and I'll show you how I did it. I ran it right up over top of this cross brace here. You just want to make sure you stay away from anything moving or hot, wrap around here, same thing over top of this one, right here to the side of the gas tank, came right down through here. Then what I did is took a 10mm socket and took these plastic nuts off along this outside edge, pulled this down enough where I could take my wire, I shoved it up there with the existing wiring it's running through, replaced all those, came out right here on the end.You can see where I have my wire routed, it's going up over the top of this. One thing you've got to keep in mind is your steering column comes out about right here, right up on the firewall. So, you can see right in here I bring my wire up above and there's a hard wire right here that I put a zip tie on so that when I pull my wire up it'll pass all that any of this here that may move or get hot.Pull the wire up just like this. I do suggest double-checking down below to make sure you're not snagged on anything. We don't want that wire hanging down while we're driving and possibly getting caught on anything.So, you can see here, after making sure my wire wasn't snagged on anything, I prompt a couple zip ties on it just to make sure it doesn't fall back down. We're going to be connecting it on our battery right in here, right there to that post. So, what we need to do is we need to take our fuse holder, we're going to cut it in half. You can see it's one solid loop. We're going to cut it in half. Then we're going to strip both sides. One side we're going to add a ring terminal, that comes in your kit, then the other side you're going to add inaudible 00:08:16 shrink butt connector. Make sure it'll hold.What we need to do is we need to cut our wire down. I'm going to leave myself a little bit of extra to work with here. Strip it back. We're going to add the other end of the butt connector. Now we'll take our heat source and we'll melt that down or shrink it down like we did to the one on the back. We're going to take a 10mm socket and remove this nut right here. inaudible 00:09:25. Go ahead and put on the ring terminal and replace the nut just like that. Also another thing I wanted to mention, you want to make sure the fuse is not in there when you make that connection. Close that up and we can install a fuse.Now that we've made our final connection, we've cleaned up our install, let's go ahead and test it out and make sure everything's working properly. Using Part number I26. Running lights, brake lights, left turn, right turn. That'll do it for a look at and installation on the Tekonsha T1 Vehicle Wiring Harness for four pole flat trailer connector, part number 118750 on our 2018 Chevrolet Equinox.

Questions and Comments about this Video

Larry P.

The running of the wiring from back to front was a little skinny on showing exactly what was done. I guess time constraints were a factor.

Etrailer Expert
Reply from Rachael H.

Thanks for the comment, we do have a help article that does address how to route the power wire if you need additional details.

Info for this part was:

Employee Joshua S
Video by:
Joshua S
Employee Jonathan Y
Video by:
Jonathan Y
Employee Jacob H
Video by:
Jacob H
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Cole B
Installed by:
Cole B
Employee Shane H
Test Fit:
Shane H
Employee Ryan G
Test Fit:
Ryan G

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