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Trailer Wiring Harness Installation - 2015 Subaru Forester

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How to Install a Trailer Wiring Harness on a 2015 Subaru Forester

Today, in this 2015 Subaru Forester, we're going to show you part number 118467. This is a T1 vehicle wiring harness with a four-pole flat trailer connector, from Tow Ready. First, I'll go ahead and show you the components. This end here will fit a factory port that's already installed in the vehicle from the factory. We have a fuse holder for its own fuse. This is the nodule. This actually takes its signals from the car and converts it down from a five wire system on a car down to a four wire system on a trailer.

It is typically combined. At the very end it has a four-pole flat with its own built-in cover. When it's not in use, typically, this is stored inside the vehicle. All right Pretty simple stuff. Let's go ahead and show you how to install. First thing we need to do is go ahead and remove the floor coverings and the foam inserts from around the spare tire and around the panel on the driver's side which is our port is located on.

Now I have to unsnap the foam insert here with a flat blade screwdriver. Just kind of feel for the inaudible 00:01:06 ridge 00:01:06 that goes all the way through the bottom. Just kind of work it loose. .. All right. Now this panel, we've got to get this one out of the way first.

This is the threshold. So you'll peel back the rubber seal a little bit so we can get our tool underneath it and pop it up. You can get by with a flat screwdriver but a trim panel tool works the best. .. Three, four.

All right. Now to loosen up our panel here we have to take out the anchor point here, so a very small flat screwdriver will pop open a tie down point, and then the cap. Then we'll remove with a 10mm socket. . Okay. With our trim panel tool we'll go ahead and pop this loose. That one came out pretty easy. The point right there, point right here. Unsnap it through the top here, gently pulling out. There ya go. There's another snap hidden back here. We pull this out and here's our tow package port right here wrapped in blue tape. We'll go ahead and cut the blue tape, go ahead and pull it free, and we're ready to install our wire harness. We'll take the white end that matches it, plug it together, and next it's just a matter of finding a place to put our nodule. Typically you want to have the wires pointing down from the epoxy side. Then we'll run a four-pole wire out the bottom of our panel. Well, then you simply just take my nodule and, with a little tab on top, we're just going to zip tie this wire harness right here. Try to hide it behind the factory connection point. When we push our panel back together it will push back and out of the way. We'll cut off our tails. We'll cut off the tail of our zip tie, make sure our four-pole is routed out the bottom of the panel for now. Then we'll go ahead and reinstall the panel. . Okay. Our threshold goes back into place. . All right. Put in insert. Take our four-pole and route it over the top of it. . Snap that back into place. Four-pole wire up. Your wire harness will stay here when it's not in use. Then our floor covering. . We are finished. When we need to use it, we just pull it out and we go ahead and shut the door on it. The door seal's thick enough it won't hurt anything. Just make sure you stay away from the latch in the center, otherwise, you'll pinch the wires and you'll have to start over. Okay Now is a good time to go ahead and check our wiring to make sure it works before we try it with trailer. Take our light tester. It'll ground to the white wire. Then we'll check our brown wire for running light circuit. Then yellow for left turn and green for right turn. Then the brakes will be a constant signal on yellow and green wires. It's always a good idea to check your wiring before we try it with trailer. Okay. With that, that'll finish it for part number 118467. This is a T1 vehicle wiring harness with a four-pole flat trailer connector on our 2015 Subaru Forester. .

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