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Quickly and easily install a 7-way, RV-style trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required.
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California residents: click here
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today on our 2018 Nissan Frontier, we're going to be taking a look at and showing you how to install the Tekonsha T-One vehicle wiring harness with 7-way trailer connector. That's going to be part number 118266. To help us with our installation, we're going to be using the Pollak mounting bracket, part number PK12711U.Here's what our wiring's going to look like once we have it installed. I do want to mention that our kit is not going to come with a mounting bracket, so we will need to pick one of those up so we can secure the connector at the back of the truck. Our wiring's going to give us a 7-way connector, that way we have all the required lights to get down the road safely, like our turn signals, stop lights, tail lights, and our reverse lights.It's also going to give us a 12 volt power source at the back of the 7-way, and the option to use an electronic brake controller if we choose to put one in later.The spring-loaded door along with the rubber gasket on the inside is going to prevent any kind of debris or moisture from getting inside. What I really like about our wiring is the fact that it is going to be a completely plug-and-play installation.
We're not going to have to cut or splice into any wires at all. We're not even going to have to remove our tail lights. We're going to have two connectors underneath the vehicle, and then we'll have a few relays that we'll have to put in place on the inside.So now that we've seen what our wiring looks like and gone over some of the features, let's show you how we got everything hooked up. We went ahead and mounted our 7-way bracket. Now we're going to take our 7-way plug, we'll slide it through, and the holes will line up, and we can take the hardware from the bracket and attach everything up.
Start by taking one of the screws, we'll go through our connector, all the way through the bracket, and then we'll secure it on the back side using a locking nut. We'll repeat that for all four holes, so we can make sure our 7-way is going to be secure.I'll come back and I'm going to take a flathead screwdriver, and while I'm holding the nut on the back of my finger, I'll just tighten it up to where they're nice and snug.If we move underneath, on the side of the frame rail on the driver's side, we're going to have two plugs. We're going to need to take the caps off of each of them. The easiest way to do it without having to take the plug off of the frame, you just take a pair of needle-nose pliers, and we'll come in and we're going to squeeze on that tab, and then we'll pull down, and we can pull the plug out. We'll do the same thing for the other plug as well.With those caps unplugged, we'll grab our wiring harness.
The black plug is going to plug into the black connector on the bottom. Just push it in until it locks into place. And then the gray plug is going to plug into the gray connector. We'll take the other end with our 7-way connector on it and we're going to route it towards the back of our hitch where we have our 7-way plug at.Before I plug my connector in, I'm going to take some dielectric grease and I'm just going to fill up this entire area. Hopefully, that'll prevent any kind of corrosion from building up and moisture getting inside the connector.
If you need some dielectric grease, you can pick it up here at etrailer.com. We'll just line it up and push it til it locks into place. We can tie up any of the excess wires to the back of the hitch here.Now that we have everything connected back here, we're going to move into the cab on the passenger side. On the passenger side, right by the outer door here, we're going to have this kick panel. If we look at the very back, we'll have this plastic fastener that's holding it in place. You should be able to remove this by hand, just turning it to the left to unscrew it. And then we're going to have to remove this lower panel on the side here. If we start on the lower part at the threshold, we should be able to get our hands underneath it. We'll pop all the clips out, so we can remove this piece. And then we'll grab behind this piece and I'll pull this one out as well.Now, behind all those panels, we're going to have several plugs. We should have one that's going to be open, it's going to have several pins on it, and it should match up to the other side of our harness. We'll take our white connector and plug it in, want to make sure it locks into place.On the other end of our harness, we're going to have a few more plugs, and we're going to be plugging some relays into there. We'll have two white plugs, we're going to have two blue relays. These are going to be exactly the same, so we just want to make sure that we plug them in correctly, but it's not going to matter which one we plug into where. We'll plug them in, make sure they lock into place. And then the brown connector, we're going to take our brown relay and plug it in. Again, it only goes on one way, just want to make sure we get it in and locked into place.Now, to help with keeping down the noise and our relays rattling around when they're back here, they are going to provide us with some of this foam insulation. What we'll do is we'll take off the backing, and we're going to wrap our relays so that even if they do bounce around a little bit and move, hopefully this will cut down some of that noise and we won't have that plastic on plastic contact noise. So we'll do that for each one of our relays. Then you can tuck the relays and the rest of your harness back into this little cubby here, and we can put all our panels back in place.So I went ahead and plugged in my tester to make sure that all the functions are working properly on our wiring. We can see that the tail light function is working, as well as the left turn signal, the right turn signal, our brakes, and even the reverse turn signal. All we have left to do now is hook up to our trailer and hit the road.That'll finish up your look at the Tekonsha T-One vehicle wiring harness with 7-way trailer connector on our 2018 Nissan Frontier.
Average Customer Rating: 4.7 out of 5 stars (200 Customer Reviews)
Quickly and easily install a 7-way, RV-style trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required.Ordered a Class III hitch for 2006 Xterra with wiring. Seamless transaction fast shipping and perfect fit straight out of the box. One of the easiest transactions I have had. I highly recommend etrailer.com to my friends and those who want professional, fast service. 356180
This wiring harness for my 2011 Nissan Frontier (118266, comes with the relays for trucks that are not haul-ready from the factory) is just as advertised. The videos were the most helpful! Please watch them. It took me about 45 minutes to connect the relays inside the cab behind the kick panel on the passenger side, plus the harness at the rear of the vehicle. It took another 45 minutes to install the bracket for the 7-way plug, but that was only because I broke 2 drill bits trying to drill through my bumper. My bad! I tested the installation by hooking up to a trailer before closing everything up, and it all worked perfectly. Just as advertised. 474566
Todd - 02/10/2019Okay, so I've finally had a day off to fully install the kit in my 2013 Pro-4X Xterra. If you're looking to do the same and are wondering if it has everything you need, don't worry, it does. I didn't time myself during install but I know it took me less than 20 minutes, you don't even have to remove the spare tire to hook up the wiring in the rear. Literally plug and play. It took me a lot more time to figure out where to install the connector. Nissan went out of their way to make this an easy install if you don't have a factory towing package, this kit is worth it. Buy it, use it. 391865
Shawn K - 06/11/2018Everything connected/ plugged in as it should but I as other's saw the brakes lock up. Now I cannot use and do even have trailer brake lights 563723
Mike L - 09/11/2018Fantastic plug and play installation of your product. Hardest part of the install was wrestling with my panel trim. Thank for your online tutorial and great on time delivery. 601987
Ken - 02/03/2020These wiring components work perfectly. They were easy to install with the instructions. Anybody can do this. I got the 7-pole connector in this package and also bought a 7-pole to 4-pole adapter with a test light so I could make sure that the connections were working. I also bought the Polak PK12711Y bracket to put on my trailer hitch. I tried the standard bracket from Walmart but they did not match the hole pattern on the 7-pole connector. Carol C recommended the Polak bracket and the hole pattern matched perfectly. I can now pull my trailer. I will return to etrailer for any of my trailer or other vehicle part needs. Thanks you etrailer. 607765
As with most buyers, I had to reverse the black and blue wires. Other than that it installed quickly and worked fine. Videos helped to make install a breeze along with the fix! 647645
Samuel C - 05/29/2020Looks like everything is there. Just got it in today, haven’t had time to install yet. Will update you in a day or so. Been having a little trouble with tropical storms and hurricanes lately. 891641
The Wiring Harness (118266) for my truck (2017 Nissan Frontier Crew Cab) was a dream to install. Two plugs snapped easily into place onto two pre-existing ports mounted to my frame. There was no mixing up the plugs. The wiring is of good quality. And, the connector has weathered the elements rather well. My only complaint is that, when plugging into the port, there is no satisfying feel of a good connection... There is no click, there is no *snick* as it seats... Its bad enough that I have bent the mounting bracket (PK12711U ) trying to press the plug further into the Wiring Harness Port to see if it doesn't need a bit more to be seated well. I find myself double and triple checking that my lights are working. But, nothing has failed (with the Wiring Harness) yet. Overall, it's good quality, but it would be nice if there was a sensory signal that the plug is connected soundly. 875861
This harness is a plug-in fit for my Nissan Frontier. Took just a few minutes to install. 866572
This product worked great. After spending days at an aftermarket hitch installer and dealer, no one could figure out why the runnings lights on my 2011 Nissan Frontier weren’t working. I spent 20 minutes online and figured out that I needed the relay harness. Etrailer helped me get the right part and install video. Really happy with this! 849062
Not really sure what to say about this. I had a problem with the Nissan wiring harness that I purchased. The wires were going to the wrong position in the plug. Not sure if all of the Nissan harnesses are wired wrong or if it was just the one that I got, but after a trip to a local truck customization shop, I got it worked out. Here is the really cool thing.....I realize that etrailer does not manufacture these. They are just a retail outlet that sells a product produced by someone else, but after I contacted them about the problem, they reimbursed me for the cost of having the harness rewired, so it would work correctly. This company shows real class in a time when most would just say "not our problem". I will definitely come back to etrailer for any other of my trailer needs. 828716
It makes wiring an easy task. 824396
Well made. Fit easily. Used a floor jack to install 822445
All connectors fit very nice and snug and wiring seems to be great quality. Only issue was the instructions on connecting the wiring behind the passenger side kick panel was confusing at first but once I realized it mean the kick panel below the interior fuse box and not the kick panel/ glovebox installation was easy 820446
Good product, easy install. FYI to canadian customers, the wiring is different. I overlooked this and had to switch two wires (i forget which ones exactly) 817263
Easy to install with good instruction 804941
Everything that I ordered fit perfect, it was a quick install on the hitch and wiring harness. 802099
Package was pretty beat up in shipping, but all contents and hardware were securely fastened to the hitch, so all was well! Fast shipping, super easy install and everything works great. Thank you! 798020
Great shipping. Products as described 796353
Was way too easy, product is perfect fit 791896
Super easy to fit on my 2018 Frontier Pro-4x. Passenger panel came off easy, a little jimmying to get the plug covers off, but not too tough. I chose to drill through the bumper to install the plug receptacle, but even that was manageable for a moderate DIYer. 791147
Installed on a 2012 nissan pathfinder. As many have said the wiring on the nissan eas backwards so I had to switch the blue and black wires. Also, I have tow package so the grey connector and to be spliced. Also worth noting, pathfinder with the tow package do not need the harness that goes in the trim panel just plug the brown relay into the tow 2 spot of the relay box. Overall quick and painless installation. 790371
Did exactly what it was needed to do once a Nissan wiring harness issue was resolved. Preston was fantastic in helping resolve the issue and stuck with the troubleshooting until it was resolved. Installing harness was easy and can easily be done in under an hour 784667
The wiring kit was excellent. The first one I got had a wiring issue, they sent me another and everything was good. Very happy. 783864
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