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Tekonsha T-One Vehicle Wiring Harness Installation - 2012 Kia Sorento

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How to Install the Tekonsha T-One Vehicle Wiring Harness on a 2012 Kia Sorento


Speaker 1: Today on our 2012 Kia Sorrento, we're going to be installing Tekonsha's T1 vehicle wiring harness with four pole flat trailer connector, part number 118506. This wiring harness is going to provide you with all the necessary lighting that you need through its four pole flat connector. It's going to give you your left turn signal, your right turn signal, your tail lamp signal, and your brake lamp signal. This will make sure you stay in compliance with any local laws. On the end, it's got a dust cap to help keep out any moisture, corrosion, and dirt for a long-lasting connection. This can either be connected to a four pole flat bracket like we have here, or you could just use the dust cap and loop, hook it onto your safety chain loop.Now that we've gone over some of the features, let's show you how to get it installed.

We'll begin the installation by removing both taillights. There's two Philips head screws on each taillight that need to be removed. We're starting on our driver's side. Now you want to pull rearward on the taillight to remove it. You can go ahead and disconnect the electrical connector located at the bottom by pressing in on the release tab here.

Repeat that same process on the other side. Now on our driver's side, we're going to remove both of the pushpins holding our bumper. Use the Philips head screwdriver to unscrew the center, and then they'll just pull out of place. And then remove the one screw located behind the taillight.We'll then take a piece of airline hose, a coat hanger, anything else that's stiff but does have some flexibility, to feed down from the top to the bottom, and use it as a pull wire. Once you've got that fed through, we can use it to help feed up some of our wiring.

Now take one of the yellow heat shrink connectors. We're going to crimp it onto the black wire from our control box. Then strip back some of the black wire provided in your kit, and crimp it onto the other end. Then we'll turn on our heat gun, and we're going to shrink down our butt connector. This'll help keep out any moisture and prevent corrosion.Now, we're going to mount our ground wire for our control box.

Going to use the self-tapping screw provided in the kit. We're just going to thread it right into the body, using a quarter inch socket. Then we'll connect the yellow wire, the factory wire harness on our driver's side. Tape the ends of the wire that we're going to pull down, which is all of our remaining wire, and we'll use this to feed it down. Then put a little bit of alcohol on a rag, and clean off the surface between your bumper and your fascia there, because we're going to be sticking our module right onto it with the double-sided tape. This will help the adhesive adhere to the bumper.Then peel back one side of your adhesive tape, stick it to the back side of the module, peel off the other side of the adhesive tape, and we're going to stick it to our fascia. You could stick it also to the body, but the fascia's a little bit larger surface area, so it should make a better bond. And you want to to hold it there for about 25 seconds. Now you can reinstall the taillight on your driver's side.When you reinstall your taillight, you'll plug the other end of your harness where your factory connector used to be. Now we're going to feed our fish wire down in our passenger side. We'll be using this to pull the wire back out. We can now sort of some of our wiring. Your four pole connector is good to be mounted over by your hitch. You can use the dust cap to hold it onto your hitch, but our customer here has opted to get a four pole bracket, which we'll just slide it on through.Now, route the green and red wire over to our passenger side. We're going to connect the red and green wire to our pole wire, and pull it back up. Once you've got your wire pulled up, disconnected it from your pull wire, and plug it into your factory harness. You can now reinstall the taillight on your passenger side.We can now take the black wire that we ran down. We're going to run it up to our engine compartment to connect to our battery. I'm going to route that wire now, and then I'll show you how I routed it. We routed our black wire down, up above our rear suspension, and then followed up our driver's side frame rail. Whenever possible, it's best to follow your factory wiring, as it's already been routed in a location that's not going to be near any excessively hot heat source, such as your exhaust, or moving components such as your steering and suspension.Now, we'll take our fish wire. We're going to go down, back by our brake booster, down the side of the firewall to where our frame is. Once again, we'll tape our wire to our fish wire. Then pull your fish wire up and bring your wire into the engine compartment. We can now install our fuse under the positive post of our battery. Go ahead and pull back the protective cover by pushing in on the release tab. Then take the fuse holder from your kit and cut the wire in half. Now, strip back both ends. Connect one of the yellow heat shrink connectors to one end of the fuse holder, and connect the yellow ring terminal to the other end.Route your black wire over to your positive post. Cut back any excess. We're going to leave a little bit of excess, just for future repairs, need be. Strip back some of the black wire, and connect it to the other end of the yellow butt connector on your fuse holder. Then shrunk down your butt connector using a heat gun. We'll then hook our ring terminal to our battery positive post by disconnecting one of the nuts using a 10 millimeter socket, sliding on the ring terminal, and reinstalling the nut.Now, insert your fuse into your fuse holder. You can now reinstall your battery positive cover. It may not go down all the way, due to the thickness of the wire. You can trim the cover to make it snap all the way on. However, as long as the front's snapped in, it's not going anywhere. We can now test it out. You can hook it up to your trailer to check your lights, or you could pick up a little tester tool here. Now, operate your lights and verify they're working properly. As you can see here, we've got our left turn, right turn, tail lamps, and brake lamps. With everything working properly, you can go back over all your wiring, use the zip ties in the kit to button everything up, and you're ready to hit the road. And that completes our installation of Tekonsha's T1 vehicle wiring harness with four pole flat trailer connector on our 2012 Kia Sorrento.


Info for this part was:

Employee Zack K
Video Edited:
Zack K
Employee Jacob T
Video Edited:
Jacob T
Employee Cole B
Installed by:
Cole B
Employee Jonathan Y
Video by:
Jonathan Y
Employee David F
Test Fit:
David F

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