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Tekonsha T-One Vehicle Wiring Harness Installation - 2019 Acura MDX

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How to Install the Tekonsha T-One Vehicle Wiring Harness on a 2019 Acura MDX

Today on our 2019 Acura MDX, we're going to be taking a look at and showing you how to install the Tekonsha T-One vehicle wiring harness with a 4 pole flat trailer connector.Here's what our wiring looks like once we have it installed. It is going to provide us with a 4 pole flat trailer connector, that way we have all the lights to safely get down the road, like our tail lights, turn signals, and our stop lights. Our wiring is designed to stay on the inside of the vehicle whenever we're not using it. But when we do, we can simply just drop it out the hatch, and so long as we stay away from the latch mechanism, the weather stripping here will provide enough cushion where the wire won't get damaged. Whenever we're not using our wiring, it's going to store nicely under the compartment by our spare tire tools and out of sight.Our wiring does have a convertor box, and it's going to help convert the signal from our Acura to a working signal for our trailer. But it's also going to protect the wiring on our Acura in case there's any problems on our trailer, so there won't be any back feeding.

One thing you're really going to like about our wiring is the fact that it's not going to involve any kind of cutting or splicing. We're going to have a factory plug underneath the panel that we'll plug our wiring into, and then a few fuses to put in place to activate it.So now that we've seen the end result of our wiring, let's show you how to get it installed. To begin our installation, we're going to want to open up the rear hatch on our MDX, and we're going to want to get access underneath the floor coverings here. So we'll move the mat out of the way, lift up the lid, and then most of your MDXs are going to have this carpeted panel underneath. It comes out, just lift up and set it aside for right now.

If we come to the driver's side, we're going to have our fuse panel that's going to be right underneath that carpeted section. The bottom here will have a small tab, so we can take a flat blade screwdriver or trim panel tool and pop that cover out. It will give us access to the fuse panel, and we'll have that green plug with a green wire coming out. The port next to it is going to be where we're plugging in our wiring harness.So we can grab our wiring harness with the white plug on the end, and I'm actually going to feed it coming from the back, by the threshold and go around. That way I don't have to worry about the wires interfering with the cover.

That way, we still have access to our fuse holder as well.Now, we're going to have a white wire with a ring terminal, this is going to be our ground wire. We have a couple different options of how we're going to hook it up. We can use the included self-tapping screw and go into some sheet metal, or if we come to the back again, by the threshold, we'll have a factory ground right here. So I'm going to grab a 10 millimeter socket, and then I'll pull the bolt out, slide the bolt through the ring terminal, and then we can replace it, making sure that all of our factory grounds are still in place as well.Now we just need to mount our convertor box. And again, a few different options.

We can use this zip tie and the tab on top, or we can use the double sided foam tape. We'll just take the backing off one side, stick it directly to the back of the convertor box, remove the backing off the other side, and we'll just find a nice flat spot and press it directly against the body.We are going to have a few fuses that we're going to have to put in place to activate our trailer wiring. So if we look into our fuse panel here, we'll have a 20 amp fuse on top, and then an open spot next to it. We want to grab the 10 amp fuse from our kit and put it into that open spot. Make sure you press it in all the way. And then we'll have an additional one, it's going to be a 7-1/2 amp fuse. But this one is going to be going into spot number 11. Put it into that open spot. Then we can put our cover back in place and tidy up any wires at the back.So we can start putting all the interior panels back in place. I went ahead and plugged in my 4 pole tester. If you need one of these, you can pick one up here at We can see that my tail light function's working, along with my left turn signal, my right turn signal, and my brakes.That'll finish up your look at the Tekonsha T-One vehicle wiring harness with a 4 pole flat trailer connector on our 2019 Acura MDX.

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Info for this part was:

Employee Joshua S
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Joshua S
Employee Jonathan Y
Video by:
Jonathan Y
Employee Jacob T
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Jacob T
Employee Dustin K
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Dustin K
Employee Chris R
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Chris R
Employee Zach D
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Zach D
Employee Cole B
Installed by:
Cole B
Employee Andrew S
Test Fit:
Andrew S
Employee Robert C
Test Fit:
Robert C
Employee David F
Test Fit:
David F
Employee Ryan G
Test Fit:
Ryan G

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