Tekonsha T-One Vehicle Wiring Harness Installation - 2020 Nissan NV 1500

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How to Install the Tekonsha T-One Vehicle Wiring Harness on a 2020 Nissan NV 1500


Ryan: Hey everybody, I'm Ryan. And here at etrailer we install parts, test fit them, and review them, that way we can help answer any questions those of you may have. And that's exactly what we're doing today. Today on our 2020 Nissan NV1500, we're going to be showing you how to install the Tekonsha T-One Vehicle Wiring Harness.So we do get a lot of questions about being able to have a 7-way connector plug, as well as being able to use a brake controller. So this is one of the three components that you're going to need to be able to do that. If you want a 7-way plug, you're going to need to pick up an ETBC7.

And if you want to have that 7-way plug with a brake controller, you're going to have to pick up the ETBC7 as well as a brake controller. And a couple that I really like are the Tekonsha P2 and P3, they have a lot of adjustability and are really user-friendly.So a lot of our customers use these vehicles primarily for work, and a lot of them will tow a trailer with it. And with that, you're going to need some wiring to aluminate the lights on your trailer, that way you not only remain safe, but legal as well. Now today on our NV1500 our wiring is going to be stored inside of our vehicle, out of the elements, but it's going to be really easy to get to whenever you are ready to use it. You're just going to open up your doors, and then we can just grab our wiring here.

So the way this is going to work is you're just going to drape it outside and more or less close your door on it. Now that's perfectly acceptable, you're not going to hurt the wiring. One thing you do need to pay attention to though is you want to avoid the latch, you don't want it to get hung up in there. So once we have it draped over we can just close our door, and then we're ready to hook up to our trailer.Now, something I want to mention, if you would prefer to have your wiring kind of permanently mounted out here next to your hitch, that can be done. I did look inside for a factory grommet to be able to drop our wiring down through the bottom side so we could mount it out here, I really didn't find one that would work all too well.

So if that's something that you want to do, chances are pretty good you're probably going to have to drill a small hole and pick up a grommet. That way you can pass this wiring through and get it mounted.So I will say Tekonsha does make a really nice harness. It's one of my favorites and that's because it's very well built. Everything is put together really nicely and should last you a long time. I also really like the fact that they use a module box.

So what that module box is going to do is protect your Nissan's factory wiring if a short or something like that we're to occur on the trailer side. So it gives you a little peace of mind there knowing if something messes up on the trailer, you're not going to jeopardize your vehicle's factory wiring. Now I do suggest just to help keep this in working order longer, even though it does have a nice thick rubber dust cap, to apply some dielectric grease to the terminals occasionally. Especially for those of you that do end up mounting it outside in the elements, that dielectric grease is going to really help protect these terminals and keep them in good condition.So at the end of the day, a great solution for those of you that are needing some trailer wiring. Now, as far as the installation goes, some parts are really straightforward and easy, other parts are a little more difficult. Trying to run your wires through small openings can take a little bit of time, but as long as you stay patient and focused you should have no problem getting it done at home, in the garage, or maybe even in the driveway. Speaking of which let's go ahead and put this on together now.To begin our installation you're going to want to be at the back of your NV1500, can swing open our doors, and we're going to need to disconnect our taillight wiring harness which is located here on the inside just behind our taillights. So if you look right here, this is going to be our taillight connector. To make it a little easier to work with we can release it from the body of our vehicle. You can kind of just pinch down on that black tab there and that'll free it, then we're going to disconnect it. So simply push down on this center tab and pull the two apart. You can then grab our vehicle wiring harness, and we're going to take the T-connector end here with the yellow, brown, and white wires and simply plug these in. So one end of the T connector will go to that side, and the other end we'll just plug back into that side.Now what we can do is take our green and red T-connector wire and route that over to the passenger-side taillight connector, so I went ahead and did that. And kind of inside of the body of the vehicle actually, you can just simply run that wiring up through. So I just pushed it up to each hole and reached down there and grabbed it and just continued to feed it all the way through the body of our vehicle. Now, if you're having trouble kind of reaching in there getting it, one thing you can do is take like a coat hanger and just say for example put your coat hanger through this hole and run it down out to the next hole. You can tape your wiring to it and pull it down, that'll help you out a little bit. But I simply just kept following it down and brought it out right here where our factory connector is. So we'll do just like the other side, disconnect it, plug in our T-connector into the factory harness here.Now what I'm going to do is secure up our module box, and I'm going to use the included two-sided sticky tape. So make sure the surface is nice and clean, you can use some rubbing alcohol or something like that. Peel off one side of our tape and stick it to the box. Now this is a little tricky to see, we don't have a ton of space in here, but if you kind of go through this pocket and if you look in there there's a nice flat metal surface, and that's exactly where I'm going to stick our module box to. That way it's out of the way and will not potentially get damaged or anything like that. So peel off that other side of the backing paper, we'll work that in there. And once you have your module box secured in place, this is what it'll look like.Now we can grab our white wire with the pre-attached ring terminal. And this is a ground, so we're going to have to secure it to the body of our vehicle. I think I'm just going to come out of the small opening here and screw it down somewhere right in here where it's nice and flat and clean. I'm going to do that using the included self-tapping screw.Now we're going to have a black wire coming out of our module box, and we're going to need to connect that to the big bundle of power wire that we got with the kit. Now, just to make it a little bit easier to understand what's going on, I went ahead and routed this wire up into this section. Once we get it connected, I'll show you how I got it here in the first place. So what we're going to do, one end of the bundle of power wire, we're going to strip back that insulation. We're going to take one of the included heat shrink butt connectors, slide that over the bare end of the wire and crimp it down. Take the other end of our butt connector, and that's going to plug into the black power wire coming out of our module box. So that'll slide in, get crimped down, and since this is a heat shrink butt connector I'll come back with my heat gun and seal up the ends.So the way I was able to actually get our power wire up here is from the bottom of our vehicle up. Now, there's a grommet underneath that I'll show you in a minute where you can run that wire through, and what's going to happen is it's going to come through this little panel here. Now you will have to kind of move this cardboard out of the way if you have it. If you do have it, that's just held in with some pushpin fasteners like this. Just pop underneath the head with a flat-head screwdriver and pull all those out, the ones you can get to, and then you can kind of peel this back. And it's a little tricky to see, but it's actually pretty easy to feel. But you'll grab your wire from down inside of here, and if you run it towards the back. You see this opening here where our four way flat connector comes through If you kind of look in there, there's another hole. So when you push your wire through here you're trying to aim it for this hole right here, and once you get it in through there you can kind of grab it and pull it out here where you can work with it and get it hooked up.So now underneath the vehicle, right here in this location is where our wiring came through from the bottom of our Nissan. So right here there is, or would be a piece of tape like this covering up a hole. And that's the hole that I used to run our wire through. Now, what I did was I just took that same piece of tape and kind of wrapped it around the wire to make a grommet. This is like really thick rubber sticky tape, so by wrapping it around the wire and pushing it back through it'll keep that wire not only protected from rubbing up against the metal, but also keep that hole sealed up as well.But that being said, I just routed our wiring to the front of our Nissan, that way we can run it up into the engine compartment. So I brought it up along through here, used a zip tie there. Right here I used a P-clamp because I didn't really have anything to zip tie it to, you can pick these up here at etrailer. Routed it over on top of our frame here, and then I actually used this cross-member here to bring it to the passenger side of our vehicle because that's where the battery is. So I just ran it on top of this, again using some zip ties along the way. And you want to do your best to avoid any hot moving parts while you're doing this, so keep that in mind.Once I got to this side though, I just took our wiring and followed the frame rail. So you can see it goes there, all the way along where this factory wiring is running. And it kind of starts to go on top of our frame rail. This factory wire loom goes all the way to the front, so that's what I followed. And from there, kind of just goes back to on top of our frame rail. So that wire is just going to continue forward just along long through here, and kind of comes up through here. And if you kind of peel back your fender liner a little bit you can see that wire, from there it goes up into our engine compartment.So now if we move to our engine compartment, this is where our power wire comes up. And what we need to do is attach it to a fuse holder. So make sure the fuse is not installed in the holder. What we're going to do is cut that holder in half and strip back both ends of the insulation. This fuse holder is going to get attached to our power wire. Give those ends a twist, keep them nice and tight. One end of our fuse holder is going to receive a ring terminal, so that just slides on and gets crimped down. The other end of our fuse holder, we're going to take another one of the included butt connectors and get that crimped on. Then if I take the other end of our butt connector there, that's going to plug into our power wire that we ran up here and that's going to connect everything together. Now, again, since this is a heat shrink, I grab my heat gun and get everything sealed up.Now we can get our ring terminal hooked up. So if we lift open our positive battery terminal cover we're going to have this nut here, which is a 10mm, and what we're going to do is loosen that up. If it comes all the way off easily great, but a lot of these get hung up. They're not really designed to come completely off so you'll kind of feel it hit a hard spot, which it did right there, so what we're going to do to get it connected is just take our ring terminal and just cut a small opening in it. Now since this ring terminal's fairly large, what I'm going to do is kind of just pinch it together, make it a little bit smaller, and that way it'll connect a little bit better. So about like that. And that's simply just going to sneak in behind the head of the nut there. You can kind of hold it in place and then just tighten that nut back down.So once you have that nice and snug, you can come back to our fuse holder, put in the included fuse, close up our dust cap. And then what you can do, since now we can't close our cover completely because our ring terminal's kind of hitting it, you can kind of line it up there and if you want just kind of put a small cut in your plastic cover. Cut a little piece out and then that'll allow it to kind of fit around our ring terminal, and we can close the cap completely that way. So I cut it out a little bit more, now our cover completely closes.Now it's a good idea to check our wiring, to make sure that it is functioning properly. I'm using this little tester, and you can pick this up right here at etrailer. That being said, we'll try our left turn signal, our right turn signal, our brakes, and our running lights. And that'll finish up our look at, and our installation of the Tekonsha T-One Vehicle Wiring Harness on our 2020 Nissan NV1500.


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Info for this part was:

Video by:
Joshua S
Video Edited:
Jacob T
Video Edited:
Sue W
Installed by:
Kathleen M
Installed by:
Cole B
Test Fit:
Ryan G

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