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Tekonsha T-One Vehicle Wiring Harness Installation - 2020 Hyundai Palisade

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How to Install the Tekonsha T-One Vehicle Wiring Harness on a 2020 Hyundai Palisade


Hi there, Hyundai owners. Today on your 2020 Hyundai Palisade we're going to be taking a look at and showing how to install Tekonsha's four-pole flat trailer connector vehicle wiring harness. Your wiring is installed and stored underneath the vehicle. You've got a couple of different mounting options. The most traditional way to get it all mounted up is to install it, run your wire over, and secure it to the safety chain loop on your hitch. Or, if you want to get a little bit better aesthetic and a little bit more secure mounting, we have brackets available here at etrailer.com.

That's what I've mounted up here. We're using a no-drill bracket to attach to the hitch, and then our four-pole bracket that attaches to the no-drill bracket. What's nice about this is you don't have to drill into anything on the vehicle to get it mounted up. The only thing you might be wondering is why is it so far off to the side. Due to the spare tire where it contacts the hitch, we weren't able to install the brackets close to the center because of the contact with the spare tire.

But putting it off to the side is fine. It's still functional and it still has a nice appearance being tucked up close underneath the vehicle.If you're looking to add wiring to your Palisade, this kit here is almost a no-brainer. It's super easy to install as it's custom designed for your Palisade. It has a connector on it that plugs directly into the factory connector located underneath the vehicle on your Palisade. Since all you have to do is just drop this panel down and plug it in, it couldn't be any quicker and easier.

It provides you with all of your necessary lighting to keep you DOT-compliant in all states, which includes your left turn signal, right turn signal, tail lamps and brake lamps.One of the things that I like about a installation like this versus a splice type where you have to go in and tap into the lights is, with this one, not only is it easier and faster to install since it plugs in, but the module that's included in your harness offers circuit protection. The module will monitor the outputs to your trailer. If it detects any shorts or opens, it will automatically shut down that circuit to prevent any damage from occurring to the wiring in your vehicle.It has a maximum output of five amps on the stop/turn circuits, which is going to be more than enough for your medium and even your larger size trailers. That's plenty of current for multiple lights on the backside for the stop and turn. Seven and a half amps maximum output for the tail lamps.

Typically on your trailers, you have more taillights, as those are your marker lights and everything else. Seven and a half amps is more than enough for even some of your larger trailers out there, especially if you've got LED lighting.When using your four-pole flat trailer connector, if you're having it mounted on the outside like this, I highly recommend using some dielectric grease on the inside to prevent against corrosion and ensure a long-lasting connection. You can pick up some dielectric grease here at etrailer.com.Included on your four-pole connector you will have a dust cap to help keep out any moisture and dirt. With some dielectric grease, that really gives you a nice sealed point here at the back when you're not using it.Now when it comes down to it, this is my personal choice for getting wiring installed onto your Palisade. With the custom fit connector that plugs directly into the vehicle, it couldn't be any easier to get it installed. There's plenty of length on your four-pole wiring to get the connector over to your hitch or route it wherever you'd like. Some other competitors shorten the length coming off of the module, which can make getting it mounted up a little bit difficult. But with this one here, it's got plenty of there so you should be good to go.Ultimately, this harness is going to keep you safe by taking all the lighting signals on your vehicle and transferring them to whatever you're hauling behind you so people behind you know your intensions when going down the road, whether that be a trailer or a cargo carrier loaded up with a light kit installed on it.Now that we've gone over some of the features, let's go over the installation together so you can have the confidence to do it at home. We'll begin our installation underneath the vehicle on the driver side. We need to access our factory connector, which is going to be located underneath this panel. There are three pins we're going to take out. We're going to use a flat-bladed screwdriver or a trim panel tool. There are little grooves in the side of it around it. Take your screwdriver, put it in between to pop out the center. Then you can just pull the whole pin out. We'll do that with the other two. Then we can use a 14mm socket to remove the last two fasteners that are holding it on. They're located in the curved portion here straight up. There are two of those. We're going to take our 14mm. When you go to take these down, since they're kind of designed to be pushed on there, you want to give a little bit of pressure downward to help it come off. Same on this one. Since we've got a hitch on there, it does hit a little bit on the bolt there, so you just got to work it around if you've installed your hitch already. We'll set this aside.The connector we're looking for is going to be taped to the harness coming out of the bottom of the vehicle. We're just going to go ahead and cut that tape. That'll let us get our connector down. There's a cover on it. We just need to remove that, press in on the release tab there, and we can pull that off. This will expose our factory harness here that we're going to plug our new harness it into. We've got our new harness here so we're just going to take the end of our harness and plug it right in to our factory connector.At this point, we can start attaching our wiring using the included zip ties and get our module attached. The module does come with some double-sided adhesive tape. We're going to be using that to just stick it onto the paneling over here, keep it up out of the way. Go ahead and take your adhesive, peel off some of the backing, and stick it onto the back of your module. Before we go to put it onto the vehicle side, I recommend that you use some alcohol and clean off the surface before you go to stick it in place. That'll just ensure better adhesion.I've gone ahead and cleaned off the area right here. I've decided to stick it next to where the harness comes out here. That way we can stick it here and have our zip ties that come included attach to it as well to just make it as secure as possible. We'll pull off our backing now. We're just going to go ahead and press it into place. You just want to press on it for about 20 seconds to ensure good adhesion. Once you've got it stuck in place, you can use your included zip ties to clean up our excess wiring.As you can see here, I've gone ahead and taken all of the excess wiring and secured it to our factory wiring, and then took the four-pole harness and routed it down our factory wiring over towards the center of our hitch. Now once you get over here, you can use your dust cap to secure it to the safety chain loop to help keep it up off the road. I would also probably secure a little bit further down than I did, but our customer purchased brackets that we're going to be installing on here to get our four-pole securely mounted up that way.Once you've got it all routed over this way, we can take our undershield panel though and just put that back in place. When you go to put your undershield back on, we don't need to tighten the nuts down. This actually just pushes back in place onto the studs. It is a little tricky getting the panel back on if you've got your hitch in place as the hardware that goes through the firewall does kind of get in the way, but you can work it around there just like that and it'll slide on. They both just push into place. We can line our holes up here along the bottom and then reinsert the push pins. To do that you just insert the pin inside the hole and then push in the center to lock it in place.Now if you look at it here, this is another mounting option that you've got. We have brackets like this available here at etrailer.com. These are two separate brackets. We've got a four-pole bracket here. This is actually a no-drill bracket that clamps around your hitch to give you a place to be able to mount your regular four-pole bracket. What's nice about these brackets here is they also accommodate seven-pole wiring. So if you we're going to upgrade from a four to a seven, you can use your no-drill bracket here to get your seven-pole mounted up. I did have to bend the seven-pole 90 degrees in order to get the correct angle for it to line up at the bottom, but if you just hold it up there and mark it, you can easily bend it yourself to achieve a nice look.Now all that's left to do is test it out and make sure everything's working properly. You can plug in a tester like the one we have here. If you'd like one, we have them available here at etrailer.com. Or you could just plug it into your trailer and verify that all the lights work. You want to make sure you have your left turn signal, right turn signal, tail lamps and brake lamps. With everything working properly, we're ready to hook up our trailer and hit the road. That completes our installation of Tekonsha's four-pole flat trailer connector vehicle wiring harness on our 2020 Hyundai Palisade.


Info for this part was:

Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
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Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Dustin K
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Dustin K
Employee Jonathan Y
Video by:
Jonathan Y
Employee John S
Video by:
John S
Employee Thomas T
Video by:
Thomas T
Employee Schuyler H
Video by:
Schuyler H
Employee Cole B
Installed by:
Cole B
Employee Robert C
Test Fit:
Robert C
Employee Conner L
Test Fit:
Conner L
Employee David F
Test Fit:
David F
Employee Ryan G
Test Fit:
Ryan G
Employee Clayton O
Test Fit:
Clayton O
Employee Bradley B
Test Fit:
Bradley B

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