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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

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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. Call 800-298-1624 to order Tekonsha custom fit vehicle wiring part number 118266 or order online at etrailer.com. Free expert support on all Tekonsha products. Guaranteed Lowest Price 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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  • Reviews (265)
  • Q & A (0)
  • Videos (10)
  • Photos
  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring

  • 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.


Features:

  • 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

Item # 118266

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 - 2018 Nissan Frontier

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.


Customer Reviews

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

Average Customer Rating:  4.7 out of 5 stars   (265 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.

- 118266
by:

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.


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


- 118266
by:
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.


Comments
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



- 118266
by:
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. etrailer.com 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: https://www.etrailer.com/faq-tb-14-02-Nissan-Suzuki-OEM-Wiring-Harness.aspx 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.



- 118266
by:

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


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


- 118266
by:
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



- 118266
by:

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


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


- 118266
by:
2011 Nissan Xterra

Always a pleasure to deal with the experts at etrailer. They make sure that the items you order will work together. Their online information is second to none. Thanks!



- 118266
by:

Everything hooked up fast and easy. I use it a lot and I am very happy with the wiring harness and the trailer connector. I recommend these products.


Comments
Great. Very pleased. Works great.
Johnny C - 09/17/2021


- 118266
by:

Fits like a glove. It would be nice if the wiring package came with a bracket too.


Comments
For a mounting bracket, we have the Mounting Bracket and Installation Hardware - Pollak 7-Pole, RV-Style Trailer Connector - Vehicle End Part # PK12711U
Mounting Bracket and Installation Hardware - Pollak 7-Pole, RV-Style Trailer Connector - Vehicle End
$6.46
.
-- Etrailer Expert Thomas M - 01/26/2022


- 118266
by:
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.


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



- 118266
by:
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 etrailer.com. The only difference was that I mounted the bracket directly to my bumper instead of the hitch.


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


- 118266
by:
2022 Nissan Frontier

Wire harness is awesome, but shipping is another story! it was shipped using ups surepost. Took 5 days to get across town. Hitch arrived promptly thought the harness would be the same. 2 days from shipment to Goodyear AZ 5 days from Goodyear to my house across town.



- 118266
by:
2009 Suzuki Equator

Installed this on my 2009 Suzuki Equator. Was literally a half hour job. All seems to be working as I tested with my test light. Everything plugged in just as was described. Cut a 2 inch hole into the face bar for the mount.



- 118266
by:
2011 Nissan Xterra

It was very easy to determine what parts I needed on the etrailer website. The videos helped me do that. Delivery was prompt. Installation was made much easier by the installation videos. I appreciated that the installation videos were also attached to my shipping notification e-mail making them easy to find and reference.



- 118266
by:

Super easy plug and play installation into my 2006 Nissan Xterra. Everything fit as it’s supposed to. Used part number PK12711U to mount the plug. Super easy as well. Install videos are spot on. Shipping was fast. Definitely buy from these guys again.



- 118266
by:

Have not installed yet, will do so after I get the hitch on. But arrived safe and looks good.



- 118266
by:

Great product. Plug and play. I wish it had included the mounting bracket for the plug or that it had popped up as a suggested accessory. I will need to buy this piece after my initial install.



- 118266
by:
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.



- 118266
by:

Good product and great service from etrailer! !!!Important note: 2012 Nissan Xterra (depending on what factory it was built) has the 12v power and brake wire REVERSED on the factory installed harness. Meaning when you plug in your trailer, there will be constant power to the brakes on no power to the charge line. If this happens to you like it did to me, you need a tester and a couple butt connectors to make the switch at the 7 pin connector. Also note, these plugs use the trailer for the ground so you're tester wont read if the trailer is not plugged in and you have to hold one of the tester ends to metal on the trailer.


Comments
Thank you for your review. This is a common issue on the Nissans. I have attached a very helpful article that explains the issue and how to fix it.
-- Etrailer Expert Heather A - 05/12/2021


- 118266
by:

Everything I bought a year ago continues to work well. Towed my trailer with your hitch; stepped on the brakes; all is well! Thanks.


Comments
Still working perfectly
Mgoodst - 12/16/2020


- 118266
by:
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!!!



- 118266
by:

Perfect fit...no problems a year later. Had to drill a hole for the 7 pin connector (optional but nicer look)



- 118266
by:

Quality product, good fit and finish. Directions are good, but can be slightly confusing but not bad at all



- 118266
by:

When I originally installed this kit it was a parent there was a problem with the brakes. The constant voltage wire and the brake wire or reversed. So I had to swap the two wires so the system would work. The technicians were knowledgeable when I explained what was happening. I am glad I was able to get it working. It was just an extra step that I did not anticipate.



- 118266
by:

Convenient solution with quick shipping time~


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