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  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 7 Round - Blade
  6. No Converter
T-One Vehicle Wiring Harness with 7-Way Trailer Connector

T-One Vehicle Wiring Harness with 7-Way Trailer Connector

Item # 118266
Our Price: $81.26
Custom Fit Vehicle Wiring

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Tekonsha No Converter Custom Fit Vehicle Wiring - 118266
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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. 1-800-496-5010 to order Tekonsha custom fit vehicle wiring part number 118266 or order online at Free expert support on all Tekonsha products. Great prices and Fastest Shipping for T-One Vehicle Wiring Harness with 7-Way Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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Tekonsha Custom Fit Vehicle Wiring - 118266

  • Custom Fit
  • Trailer Hitch Wiring
  • 7 Round - Blade
  • No Converter
  • Tekonsha

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.


  • Provides a 7-way, blade-style trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 4-pole, 5-pole, and 6-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate 12-pin wiring harness behind passenger's-side kick panel and insert harness with relays
    • Locate factory harness connection point behind driver's-side rear bumper and plug in 7-way
  • Includes required relays to activate functions
  • Constructed of 16-gauge bonded wire
  • Comes with protective cover for 7-way connector

118266 Tow Ready Wiring Harness - 7-Way - Nissan Suzuki

Installation Details 118266 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Video of T-One Vehicle Wiring Harness with 7-Way Trailer Connector

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Tekonsha T-One Vehicle Wiring Harness Installation - 2022 Nissan Frontier

Hey everyone, how's it going Today we're gonna be going over and showing you how to install the Tekonsha T1 trailer wiring harness here on our 2022 Nissan Frontier. So a trailer wiring harness is gonna be one of the many things that we need in order to successfully tow a trailer with our Frontier. Now, in addition to this we need the trailer hitch, the ball mountain hitch ball, and also a brake controller, as well, if our trailer has brakes. All of these parts, we carry here at etrailer. Our trailer wiring harness is simply going to transfer the signals from the truck to the lights on our trailers. We can let other motorists out in the road, know what we're gonna be doing, allowing us to ride to our destination, safe and sound.

So this is a legal requirement in pretty much every state. A lot of the times, your larger trailers, such as your camper trailers, actually block the tail lights on the truck here, so we need a way to, as we said, let other motorists out in the road, know what signals we're gonna be making just so we can arrive safe and sound to our destination. So this kit here is a seven way. So this is gonna be one of the more standard types of trailer connectors for the larger trailers. Now, if you have a four way there's another kit you can purchase that has only the four way.

But if you ask me, I recommend the seven way with the seven to four way adapter. That way you have the capability to tow those larger trailers, as well as the smaller trailers should you have the need to do so. So here's what that adapter looks like. It's very easy to use. You just plug it into your seven way.

And then here is where you plug in your four way trailer connector. So the seven way trailer connector is gonna be used on those larger trailers that have electric brakes. So we're gonna have all of our standard lighting functions in addition to the electric brake circuit as well as a battery charge line circuit and a reverse light circuit, should we need it. The four way is only gonna carry your lighting signal, so just make sure you know what your trailer needs. But regardless I do recommend the seven way.

You just might also need an adapter but these are fairly cost effective, and you can pick one up here at etrailer along with your trailer wiring harness. So keep in mind your wiring harness doesn't come with the brackets that you see here. These are actually sold separately. And the reason for this is you can mount this in a number of different ways. We'll give you the exact options later in the video. Just know that you will need a couple extra things if you want to mount it like we see here. So our trailer connector here lid, this is actually gonna be spring loaded. So whenever not using it, it's gonna spring shut. There's actually a nice gasket material in there which is gonna seal up the pins inside. That way, you don't have to worry about any water getting in there causing corrosion issues which could then in turn affect your lights there. And the way this works is your trailer connector is actually gonna catch on the stop here on the lid to hold it in place so it's nice and snug. So in regards to installation this harness is very easy to install. It's definitely something you guys want to do yourself. You certainly don't wanna pay someone to do this for you. You really don't need any special tools whatsoever. Everything is plug and play. There's no splicing into the vehicle. I would, I would say, give yourselves around an hour or two to get this done. You don't have to lift the vehicle in the air or anything. It is a very simple installation. One we will walk you through step by step now. So to start your installation today you're gonna come underneath the rear of the truck here over on the driver's side. You're gonna take your wiring harness that comes in your kit. There's two ends. This is the trailer connector end, and then these are the two vehicle connector ends. So we're gonna be plugging these in first. There's gonna be two plugs on the vehicle here that we'll plug these into, but there is gonna be caps on there we have to remove first. So let's go ahead and jump underneath the vehicle so we can show you that. So directly above our trailer hitch on the driver's side frame sort of in between the spare tire these are our two factory tow package ports. Now there are plugs on these as they said so we need to go ahead and remove those. So it should just be a little clip there you depress and then just pull down. There's one plug and there's one on this as well. Now, sometimes you can't get'em with your hand and you need to grab a screwdriver. If you have fingernails you can usually get'em out a little bit easier. I have none, so I think I'm gonna get a screwdriver there to help us remove that one. Now that we have our plugs removed we'll go ahead and plug in our harness. The connector should only go in one way. We should hear them click when they've locked into place successfully. There we go. So now we're gonna take this end here and attach it to our trailer connector but we do need to find a way or devise a way rather to mount our trailer connector to the vehicle. So for this particular customer here they have a Draw-Tite trailer hitch. And Draw-Tite offers a welded on tab onto their cross tube that you can attach your trailer connector to when you purchase this bracket, which is sold separately. So you will need to pick this up with your kit. Now, if your trailer hitch doesn't have that welded tab on there, you can actually use a different bracket that sort of wraps around the hitch cross tube with the band clamp. So if you have the Draw-Tite hitch you just need this bracket here. If you have any other hitch, you're gonna need this bracket and one that clamps around. We sell both of 'em here at etrailer. And if you wanted to, you could probably drill this into the bottom of this beam here. It really just depends on what you wanna do. If you don't wanna drill into the vehicle, then I do recommend those two clamps. But now that we have our bracket already secured I'm just gonna take this end here of the trailer connector, run it through there, and then just attach it to the back of the trailer connector. It only goes in one way. Press it down until it locks into place, and then we'll just go ahead and mount this here to the bracket using the provided hardware. So now we've got some extra wire hanging down here underneath the vehicle, which we obviously don't want. So in your kit, you're gonna get some zip ties or we're just gonna secure this up underneath the vehicle here so we can get it out of the way and it's not dangling on the ground. So next thing we're gonna do is we're gonna take the other harness that comes in your kit. Looks like this. So we're gonna be focusing on these three connectors here and the three relays that come in your kit. Two blues, one brown. So we're gonna be plugging the relays into these connectors. They're only gonna go in one way. And they are kind of tight to get in there, so you do need to squeeze kind of hard. We'll just repeat this same process here for our other connectors. And there we go. Once we have them all locked into place you're gonna take your foam tape here, peel off the backing and then you're just gonna be wrapping them around these connections here. So now that we have our harness assembled we're gonna be installing this inside the vehicle. So the port that we need to locate is gonna be on the passenger side, underneath this kick panel. So we're gonna grab a trim panel tool. We're gonna remove this threshold panel and then this kick panel here to reveal our connectors. So all we're gonna do is just take your trim panel tool and just pry up first on this little threshold panel. So there we go, go ahead and set that aside. And now we have our kick panel here. So go ahead and just pull that out here. So once we have our panel peeled back we just release these two fasteners here. They we're kind of tough to release, but I just used a long trim panel tool to really dig in there and just pry those out. It looks like there's still something else holding that panel on but I'm not gonna worry about removing that because we have it tilted back enough to work. And then tucked back in here is where our connector's gonna be. Now, it is kind of hard to see. There's actually some tape on it, so what I'm gonna do is I'm gonna remove that tape there and then that should free up the connector so I can pull it forward a little bit more towards me, and then we'll just simply plug in our harness to this. Now we'll take our relays here and try to tuck them away as best as we can just to get a small as a footprint as possible. And then we're just gonna go ahead and reinstall our panel here. So now we're gonna go ahead and run through our signals, now that we have everything hooked up. Now we're using a little plugin, seven pole tester here. You guys can just use your trailer at home, but you can see we already have our 12 volt circuit active. So that's good. Go hit our brakes. Left turn. Right turn. Then finally our taillights. Now we don't have a brake controller hooked up right now but we can't show you that, but everything else works, so I have no doubt that'll work as well. And now with everything working correctly that's gonna do it today for our look at installation of the Tekonsha T1 trailer wiring harness here on our 2022 Nissan Frontier..

Customer Satisfaction Score:

Customer Reviews

T-One Vehicle Wiring Harness with 7-Way Trailer Connector - 118266

Average Customer Rating:  4.7 out of 5 stars   (300 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.


Really easy plug and play kit. Removing inner cab plastic pieces is easy(er) if you have a plastic tool like the photo I’ve used these tools a few times for plastic trim removal and its been a good purchase. Anyway easy install as I said but I forgot to include the mounting bracket that attaches to my hitch bar and secures the trailer plug. Thats why you see the harness zip tied until I order that part. Then I’ll be done. Total time on this trailer wiring install on my 2020 frontier pro 4x was about 10 minutes.


Love the ease of installation, competitive pricing and great customer service. I do recommend that you indicate that a bracket may also needed when people buy this kit.

2007 Nissan Xterra

Worked as advertised. It would have been nice if the mounting bracket was included in the kit. I had to order it from [online store] It only cost $x but I couldn't finish the project on the day I installed the wiring harness.

That is annoying sorry about that. It would be nice included in the kit. I will pass this suggestion along. In the meantime, it can be found as item # PK12711U
Mounting Bracket and Installation Hardware - Pollak 7-Pole, RV-Style Trailer Connector - Vehicle End
-- Etrailer Expert Sierra K - 06/22/2022


The first time I attempted to tow was with a rental trailer while mine was still being built. As soon as I hooked up the brakes on the trailer locked up. Cleaned all the contacts, validated the plug and receptacle was clean and tried again. Brakes on the trailer remained locked up. Thankfully, I have a friend who is fairly savvy with this type of equipment and identified that there were two pins that were switched. A pair of needle nosed pliers remedied the issue and I was able to hook up and pull the rental trailer to the destination.
We shouldn't need a friend who knows about this equipment the day of its first use to thwart a potentially ruined trip due to poor quality control.

I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 02/28/2022

2013 Nissan Xterra

Okay, 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.

Great. Havent had any problems and dont expect any. Ive since added a brake controller and airbags. They all work in conjunction perfectly.
Shawn K - 06/11/2018

2005 Nissan Xterra

This kit worked great. It took about an hour to install on my 2005 Xterra. The process was just like the video on The only difference was that I mounted the bracket directly to my bumper instead of the hitch.

Working great. Im glad I purchased the 7-pin version for this car
Keith - 07/16/2020

Nissan Frontier

Easy install on Nissan Frontier. Instructions in package are OK but etrailer videos are the best. Producing all the video content they provide is super customer service.

2015 Nissan Xterra

This was the easy install after watching the 6 minute video. 30 minutes after it was delivered, I had it installed and working! Couldn’t be happier with Etrailer!


As advertised, easy installation and helpful video to walk you through process

2015 Saturn Relay

This #118266 7-Way connector harness kit contains everything needed to install basic trailer light wiring on ALL 2015 Xterras, regardless of trim level. The vehicles are completely factory prewired for a simple plug-in installation as described below (other recent model years are most likely also prewired, just check out my photos of the three connectors and see if they are on your vehicle. If you do indeed have the three connectors, the wiring harness plugs into the two factory installed connectors located on the frame, to the left of the spare tire area (one contains the wiring for the lights, the 2 conductor connector carries the +12v charge line and the brake control wire). The relay cable & relays are installed behind the plastic panel on the right side of the front passenger footwell. The trickiest part is removing that panel, along with the plastic doorsill trim to the right of the seat without damaging them. Be very careful not to break the plastic tabs and grabbers that hold both panels in place.

This harness kit does not contain a mounting bracket for the 7-way connector. I recommend the
#TM76474 bracket, necessary to mount the 7-way connector to your bumper.

If you do need to control electric brakes on your trailer(s), consider the additional two items, below. If you choose something other than a Tekonsha controller, you will need the short wiring pigtail that is compatible with that brand, instead of the #3050P.

#90195 Tekonsha Prodigy P3 brake controller. An excellent, top performing unit. Other lower priced Tekonsha controllers may meet your needs.

#3050P Wiring pigtail. Connects Tekonsha brake controllers to the factory installed connector (see photo) under the dash, above the right side of the driver footwell. If you use a different brand of brake controller, pick out the appropriate pigtail to match it.

NOTE: There are apparently two major wiring standards associated with 7-way connections. One of them has the brake control line swapped with the +12v charge line. Make sure to check your trailer plug and wiring before hooking up to your vehicle. You may need to cut and cross the two lines leading to the vehicle’s 7-way connector. If you need to occasionally swap between the two wiring standards, install insulated male & female crimp-style connectors in the lines. Use heat shrinkable tubing over the connections to make them more resistant to the weather. For a more permanent, reliable connection, solder them instead of using the crimp connectors and apply shrink tubing over the joints.


never found where to hook up on the passenger"s kick panel!!called but never worked!!

2018 Nissan Frontier

Nissan's factory wiring may be backwards! It was on my 2018 Frontier - the brake power wire and the trailer battery charging wire were reversed. has a helpful article about how to swap it, but it still take a while to cut-and splice. (Don't even try to extract the wires from the connector unless you happen to have the specialty tool designed for it - I tried for an hour and then decided to cut-and-splice.) This kit would be better if it had a cross-over jumper to be installed in case the customer's particular Nissan has the brake wire and the trailer auxillary power wire are backwards.

Here is the article on how to fix it: I know, it's really Nissan's fault, but it's a known issue with Nissans, so it would be nice if the kit had a plug-and-play way of dealing with this known issue. It's really embarrasing when you install a brake controller, go to pick up a travel trailer, and then find that you can't pull it because the brakes are on. That's what happened to me - only later that evening I found the article that explained how the wires are reversed on some Nissans.

2010 Nissan Frontier

2016 Nissan Frontier 4 door Desert Runner. All the wiring fit great. True plug and play. Giving it a 4 star because it did not come with a mounting bracket for the 7 way plug. Should have been included. There are 2 different size plates for mounting. Make sure you order the correct mounting bracket. I used a Hopkins #48625. And get screws and nuts for mounting. # 10 x 3/4" worked for me. Shipping was on time. Support from etrailer is great

2009 Nissan Pathfinder

Fast shipping and good quality product.
I didnt need the blue relays since my Pathfinder alreay had it. What I did need was the brown relay. Gray plug came with a 6 cable plug where mine in the truck was 8, I used the original plug that came with 4way, the color combination was exactly the same, I was able to replace the plug without cutting the cables. The black plug locked the wheels so I just switch the cables, there is a video here somewhere showing how to do it. Good on price, nissan was selling me the same setup for about 141 without the extra stuff that I bought. Found this webpage a while a go, and I always find what I need at good price. Thanks a lot!!!


Exactly as described. Solid instructions easy to follow.

2011 Suzuki Equator

Simply awesome. So happy that this harness system is just plug & play for my 2011 Suzuki Equator!!

Instead of using the optional mounting bracket, I drilled a hole in the bumper for a clean/better than factory look!! Took an extra 5 minutes!!


Exact fit to interface with factory wiring on my 2011 Nissan Frontier. Works great!

Still working flawlessly. plug and play harnesses made the i stall easy
Ken - 03/12/2022


Installed as directed and everything worked - almost. called etrailer, spoke to Derek and he advised me that for my 2011 Nissan Frontier some wiring might need to be switched to correct the problem. He sent me and article with pics to fix the issue, in the attached picture the black and blue wires needed to be reversed. Now everything works fine. Thanks for the great customer service.


Great product! Easy installation.

2015 Nissan Frontier

Fantastic 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.

Everything still working great. Boat was launched 14 times since install.
Ken - 02/03/2020

Nissan Frontier

Worked great on the 2022 Frontier. Very easy install.

2014 Nissan Xterra

Good Price, excellent service, fast shipping. Seriously, what more could you ask for? Tech support you say? Nobody has more. Even installation videos! These guys go above and beyond to make sure you get the product you need and make installation as simple as possible! Knowledge is everything! Great job!


Fast easy service online. Product as advertised and super easy to install


This was very easy to install. The most difficult part was getting the caps off the factory plug ends, the installation part was a breeze.


The hitch is great, but the screws for the electrical connector have rusted.

It’s still working. The screws are still rusted, though.
Tim M - 07/18/2020

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