Trailer Wiring Harness Installation - 2018 Subaru Crosstrek

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How to Install a Trailer Wiring Harness on a 2018 Subaru Crosstrek


Speaker 1: Today, on our 2018 Subaru Crosstrek, we'll be having a look at and showing you how to install the Tekonsha T-One vehicle wiring-harness with a 4-pole, flat trailer connector, part number 118467.One nice thing about this wiring harness, if we're not using it, we can easily conceal it and store it inside the spare tire compartment of our vehicle. Now when we want to use it, we can grab the wiring harness, pull it out, drape it over our hatch, make sure it's to the side of our latch, and close our hatch down over it, and we have an adequate length of wire to reach down by the receiver of our hitch to hook up to our trailer. Now this wiring harness is great, because it requires no modification of the vehicle in order to install it. It hooks right up to your vehicle's existing, factory-installed, tow-package connector, and provides the necessary lighting functions that are required by law in order for you to safely and legally tow a trailer.This green wire here provides our right turn signal and right brake light. On that circuit, we have 2.1 amps of power output, which is sufficient to tow a trailer that has one incandescent light bulb on that side. If you have LEDs, since they draw less power, you can run a few more light bulbs.

The yellow wire is our left turn signal and left brake light. Again, like our right one, we have 2.1 amps of power output on that circuit.Our brown wire, here, that is for our tail lights and our running light circuit. On that circuit, we have 5.6 amps of power output, so if we're running LEDs, we can run several of those without a problem. If we're running incandescent light bulbs, you'll want to limit yourself to probably about three or four, just to play it safe. Now our white wire provides the necessary ground connection between our trailer and our Crosstrek for our lights to function properly.

Built into our harness, we have a dust cover, to help protect our connector when it's not in use. Now one thing that I recommend doing, even though our wiring harness is stored inside the vehicle when it's not in use, is to put some dielectric grease into our connectors. This will help prevent any corrosion from occurring, and help better protect our wiring from the elements, and you can simply close the dust cover over it.Now that we've gone over some features, we'll show you how to get it installed. To begin our install, we'll open our rear hatch. We'll remove all of our floor coverings, our spare tire tools, and our spare tire.

We'll remove our foam, floor support on the driver's side. We have two pushpin fasteners that hold it up. We use a trim panel tool on a flat-head screw driver to raise the clips out. Take the cover out. To gain easier access to our factory-tow-package connector, we'll remove our threshold.

We have a plastic pushpin fastener on each side. When you pull out the center section, the whole clip will come out with it. Then we can lift up on our threshold, and set it aside.Now that we have all of our panels removed, we have access to our factory-tow-package connector, which is on the driver's side, back area of our hatch. We'll take our wiring harness and plug into our connector until it clicks, and we'll pull back and make sure it's secure. Now we're going to tuck our module box underneath our plastic panels here to help better conceal it and keep it out of the way of any of our compartments. With our connections now made, we can now reinstall all of our panels and our spare tire the same way that they came out.Now we'll test out our wiring. We're using a 4-pole, flat, trailer tester, which we have available on our website as part number I26. Start by turning on our headlights. As you can see, our tail light and running light function is working fine. Left turn signal, right turn signal, brake lights, and while our foot is on the brake, we'll run our turn signals again to make sure they function properly. As you can see, everything is working great.That completes our look at an installation of the Tekonsha T-One vehicle wiring harness with a 4-pole, flat, trailer connector, part number 118467 on this 2018 Subaru Crosstrek.


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