Installation of the Trailer Wiring Harness on a 2018 Subaru Outback Wagon

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Trailer Wiring Harness Installation - 2018 Subaru Outback Wagon


Speaker 1: Today on our 2018 Subaru Outback wagon, we're going to be taking a look at, and showing you how to install the Tekonsha T1 vehicle wiring harness with 4-pole flat trailer connector. And that's going to be part number 118467. So here's what our wiring's going to look like once we have it installed. It is designed to stay on the inside of the vehicle at all times. And whenever we get ready to use, we can simply just drop it out the hatch, and it'll be right by our receiver tube, ready for us to hook up.Now, it's going to give us a 4-pole flat trailer connector. And it's going to provide us with all the required lights to get safely down the road, like our taillights, turn signals, and our brake lights.

Now whenever we're done towing, and we want to put it away, we can simply open our hatch back up, and we can store our wiring right underneath the floor covering, right we're our spare tire tools are.Now as far as the installation goes for our wiring, it is going to be a plug and play installation. It is going to be a little rather difficult to get to, but there's going to be a factory plug that's a little bit farther up in our hatch area, on the driver's side that we're going to plug into. Our wiring harness is fuse protected, so we're not going to have to worry about any short circuits, or any back feeding if there's any problems on the trailer end.So now that we've seen the end result of our wiring, let's show you how to get it installed. To begin our installation, we're going to go ahead and remove all of the floor covers that are in our Outback. So you can go ahead and pull the panel out and set it aside.

We'll also need to remove all of our spare tools in this foam tray in the middle. And we can leave the passenger side alone, we only need to take out the tray on the driver's side. So we can just lift up and pop the carpet section out.And then the foam tray underneath, is going to have two push pins, one towards the back, and then one in this recessed area. So we're going to grab a trim panel tool, or a flat head screw driver, come underneath that push pin, and pop them out. Then we can remove the foam tray.

Now at the very front of our cargo area, we're going to have this panel here. There's going to be several push pins along the edge at the back that are holding it in place. So if we just come underneath, prying up, it'll release those push pins, and if we lift upwards, should be able to get enough room so that we can get to this back area here.Now, if we find our cargo hook that's towards the front, we'll see that there's a wire hanging down. And it's going to be extremely difficult to see, because our connector is going to be taped to that wire farther up, right about here. So we're going to need to reach underneath this panel.

And typically, it is taped to that harness. So we're going to have tear the tape, and pull our connector out.So at the very bottom, we will find a loop that's taped to that other wiring harness. And if we follow it up, it's going to follow and it'll be taped again farther up. And again, it's really hard to see it, even laying down and looking underneath, you still might not be able to see, so you're really just feeling. Once you find that initial harness here, by this grommet, you're feeling for the other thicker wire harness, and then following it up. And again, it's probably going to be taped in two different spots.So now we can grab our harness. And the plug on our harness, is going to match up with the plug that's inside the panel there. So we can push it in, make sure it locks into place. And then basically, we're going to just start routing all of our wires towards the back here. Now there's not a very good spot to mount our converter box, but we don't want it really loose just hanging out in the back. So, if we can find a spot to zip tie it, we can zip tie it somewhere. Or you can take some tape, double sided tape, or whatever tape you have, and you can tuck it behind this panel here. There's a little bit of insulation and foam back there, which'll keep it in place, and you can just stick it to the side of the body.So I'm going to take some double sided foam tape that I had laying around, stick it to the box, and then remove the backing. And then I'm going to tuck my converter box underneath this panel, and find a nice flat area that's not in the way of any kind of insulation or foam, and then stick it right against there, so it won't be moving around. And then we can tuck all of our other wires underneath the panel.We can put our coverings back. Now, I always like to route my 4-pole wiring underneath this foam panel, and then just have it over here by my spare tire. If you're going to do that as well, you just want to make sure that the wiring is not going to interfere with where our push pins go in place. Once we have our panel lined up, we can replace our push pins, and replace all the other panels.Now we can leave our 4-pole wiring underneath where our spare is, or we can route it up by our spare tools for a little bit easier access. And then whenever we need to use our wiring, we can simply lift up the floor covering, draw up our wiring out the hatch. You just want to stay away from the latch mechanism itself. And the weatherstripping will provide enough cushion where the wire won't get damaged.Then we can close our hatch, and our wiring will be right down by our hitch, ready for us when we hook up. So then the last thing we need to do is test our wiring. So I'm going to take my 4-pole tester, plug it in, and running my lights and verify that they're all working properly. So if I turn my headlights on, we can see that those are working, along with my left turn signal, right turn signal, and my brakes. All we have left to do is hook up to our trailer, and hit the road.And that'll finish up your look at the Tekonsha T1 vehicle wiring harness for 4-pole trailer connector, part number 118467 on our 2018 Subaru Outback Wagon.


Questions and Comments about this Video

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David H 06/08/2019

Very valuable resource! 56351

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