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Tekonsha T-One Vehicle Wiring Harness Installation - 2022 Subaru Forester

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How to Install the Tekonsha T-One Vehicle Wiring Harness on a 2022 Subaru Forester


Hey everybody, Ryan here at etrailer. Today on our 2022 Subaru Forester, we're gonna be showing you how to install the Tekonsha Vehicle Wiring Harness. But before we do that, we wanna check it out and make sure it's gonna work for you. When it comes to the Subaru, people use 'em to do a ton of different things which does include pulling some trailers around. And if that's what you're planning on doing, obviously you're gonna need a way to illuminate all the lights on that trailer. That way everyone around you will know what's going on and you'll be safe and legal.

And that's exactly where a wiring kit like this one here is gonna come into play. This is gonna provide us with all the necessary functions. So we'll get our turn signals, our brake light as well as our running lights. And this one is a four-way flat type connector, so that's a really common type. The majority of the people that are pulling trailers around with the Forester, chances are really good your trailer's gonna have this type of connector so good news there.

If you do happen to need a seven-way round type connector, the little bit bigger ones, not really a big deal, there's adapters and other wiring kits available that you could hook up on the Subaru and give you that type of connector so that's always an option for you as well. Something pretty nice about this particular setup though is essentially just plugs into a factory connector, which kind of brings you to my next point, the different types of models of Foresters. So you got your base models, your higher end ones, ones like this today, we have the wilderness in, and this wiring kit is gonna work with all of those different types. They're all gonna share that same type of connector so nothing really to worry about there. Something that's pretty, pretty sharp too, you can run this wiring outside and have it mounted up like this, like we have today.

So you can use a bracket or just loop it around your safety chain opening, whatever you want to do or you can actually leave this inside of the vehicle and whenever you're ready to use it, if you do decide to keep it inside, whenever you're ready to use it, simply open up the hatch and drape the wiring out over your threshold, close the hatch on it, and that allows you to plug it in too. So a couple different ways you can use it. If I towed all the time, I'd probably do a setup like this. If it was something that I used occasionally I would probably leave it inside out the elements but totally up to you and yeah, you got those couple of choices. Other than that, though, at the end of the day if you're looking for a wiring kit, definitely one you can't go wrong with, I actually really like to Tekonsha, they to make good quality parts.

My own personal vehicle, actually that I used to have I actually had a Tekonsha setup on it. It worked for a long time without any issues so I've got faith in 'em but as far as getting the kit installed it's really not too bad at all. I kind of talked about it earlier. Essentially just plugs into a factory connector. So you have to take out a couple panels that are super easy out of the back, essentially plug it in and route the end of it where you want it. So those shouldn't give you too many issues or take up a bunch of your time. If you'd like to see all that's done though, feel free to hang around. We'll go ahead and knock this out together now. To begin our installation, we're gonna be here at the back of Subaru. And obviously open up the hatch cause we're gonna be working inside and we need to locate the connector plug. So first thing you wanna do is take any junk out of the back here, and then we can remove our floor coverings. So with that out of the way, we can remove the side piece here and then we're gonna get rid of this foam piece so that should just lift on out. And we're also going to remove this foam piece. So with this one, it is held in place with two plastic type fasteners and I will say with these, a trim tool works really well. A flathead screwdriver will work too but you wanna get underneath there. And a lot of times, if you just go crazy and start prying up, these will break, so what I've found in the past is essentially almost use some opposing force with your hand there and slowly pull up on it and that'll pop it out. So that's the trick that I found to keep these from breaking. It still happens sometimes, but the chances of it are much less But with those free, now we can take this foam piece and get it out of the way as well. So now if you look on the driver's side, right where we pulled that foam piece out, along the back here we're gonna have a connector that's taped up and that's the connector that we're looking for just like that. And now that we have located this we can grab our trailer wiring and start to get it hooked up. Now we can grab our new wiring and the connector plug on it is gonna line up with their factory connector. So that just plugs right on in, and before we route our wires and secure everything and whatnot, why don't we just test it to make sure it works properly before we get all that done. To test the wiring, I'm using this small tester. I do suggest using one of these as opposed to plugging into your trailer cause if your trailer has any issues, it might show and translate over to the wiring and things can get kind of confusing but a tester like this will eliminate that. With that side though, we'll try our left turn signal, our right turn signal, our running lights and our brake lights. So I secured our wiring. I just kind of bundled it up and used some zip ties to secure it there. And then as far as our four-way flat connector wiring goes, you can either leave it inside here and drape it over your bumper whenever you're ready to use it, or you can route it outside. We routed it outside today so it just runs down along through here and since there's really nowhere to actually zip tie it to I just use some packing tape, and stuck it to the body of our vehicle and then if you move your spare tire outta the way there's a rubber grommet and you can poke a hole in it or cut a slice of it, push a wire through to the bottom side of the car and then I came back on top and put some RTV sealer just to help keep everything sealed up inside the vehicle here. Underneath the vehicle, this is where our wiring comes down through the grommet. I put some sealer on this side too, cuz why not, and I just ran it straight through here. I did attach our wiring to a four-way flat bracket that I just screwed into the bottom of our bumper. You don't have to do that if you don't want to, you can always take this and use the safety chain opening in the hitch to secure it as well. You can just loop it around there. So a couple options, but this is what we opted for today and I think it turned out pretty good. And that'll finish up our look at and our installation of the Tekonsha Four-Way Flat Vehicle Wiring Harness on our 2022 Subaru Forester..


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