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  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. No Converter
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # 118540
Retail:$68.39
Our Price: $37.01
You Save: 46%
Custom Fit Vehicle Wiring

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Tekonsha No Converter Custom Fit Vehicle Wiring - 118540
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Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118540 or order online at etrailer.com. Free expert support on all Tekonsha products. Great prices and Fastest Shipping for T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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Tekonsha Custom Fit Vehicle Wiring - 118540

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • No Converter
  • Tekonsha

Quickly and easily install a 4-way 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 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection points at the rear, on the passenger's side
    • Plug in T-connector
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage: 7.5 amps per circuit
  • 1-Year limited warranty


Installation

This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located beneath the rear of your vehicle, on the passenger's side.


Once installation is complete, the 4-way flat connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.


It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.



118540 Tow Ready T-1 T-Connector - 4 Wire

Installation Details 118540 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:


Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118540

Average Customer Rating:  4.9 out of 5 stars   (464 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required.

by:
2015 Ford Explorer

Easy to install, seems like great quality. Have not had a chance to use it yet.

Justin E.

8/18/2023

Update a year later, still works great.

Etrailer Expert

Mike L.

9/7/2023

@JustinE Great, we're glad to hear that!


by:

Works as described. Very easy to follow instructions and I have had zero issues with it since. 10/10 would recommend.



by:
2011 Ford Explorer

I just bought a new 2011 Ford Explorer, I need to tow a small utility trailer. I was unsure how this harness would be plugged in, but it was so easy a 5 year old could do it. I found the Ford provided trailer harness behind the right rear tire above the muffler, this harness clipped right in, I used the original cap on the other end to cap the male end off.
I have only one bad comment, the zip ties provided are not long enough to go around the trailer hitch pipe. So I doubled up or used ones I had. There is plenty of length to get me to the hook up. Make sure you keep it away from the hot pipes. See attached pics. I submitted a couple questions to etrailer.com and they were very responsive.



by:

Very simple install on the wiring harness.
This
is my 2nd hitch installation and should last My lifetime.



by:

Nice hitch. Well made. Very sturdy Installation was easy as everything fit like it was supposed to. No modifications or issues. Wiring harness connected easily as advertised. Very pleased overall



by:
2014 Ford Explorer

Perfect fit. I watched the video for installation and found that my 2014 Ford Explorer didn’t have the same connection pictured. Mine terminated with a cap instead of being connected in series like the video.

Once I figured that out with the help of customer service (who was awesome by the way) I pulled it off and hooked it right up. Zero problems. These folks do a great job of knowing their product and providing great service. This is my third hitch install with etrailer.com.



by:

Super fast delivery. And had it installed in 15 minutes start to finish.
Thanks



by:
2018 Ford Explorer

Great product! Have two existing connectors underneath my 2018 Ford Explorer XLT. Had to disconnect both to determine which one was correct - no big deal. Ran the wiring pretty much straight back to the bumper and over to the hitch. Had to use a couple longer zip ties.



by:
2017 Ford Explorer

Great product. Great customer service….Kudos to Quinn and Wayne! Great instructional material, especially the videos. I only had two minor issues. First, the rubber muffler hangers were buggers to remove; second, the instructions for the wiring harness indicate the 2017 explorer has two plugs which the Tekonsha T connector plugs into, problem was my explorer only has one plug? but in short order between Quinn and Wayne, I learned I only needed to plug one side of the Tekonsha T connector into my plug and cap the other side of the T with the cap I removed from my single plug. Long story longer, I took my vehicle to [moving company] who checked out the wiring with their test gizmo and all was perfect!
Big thank you to the etailer team!!!

Michael

11/11/2022

My hitch and wiring harness have performed Flawlessly! Highly recommend etrailer.



by:
2018 Ford Explorer

OEM quality this is the best way to go for the trailer lights no splicing no soldering just plug n play!



by:
2019 Ford Explorer

Received the item on time, I'll be installing it tomorrow



by:
2018 Ford Explorer

I called on a Sunday afternoon regarding confusion of a part. To my surprise a "person" picked up and helped me thru the process. To top it off a tech, that was previously with another customer, called back 10 minutes later to confirm and help clarify the confusion. By Tuesday I received the correct part and the return label for the part to be sent back. I have used e trailer for multiple items, but this was the first time with an issue (My fault) and they did an excellent job of helping me rectify my mistake. This solidified my decision to only purchase from e trailer!



by:

No issues at all. Would recommend and have recommended etrailer.com to other people.



by:

Purely plug and play! Found the connection on my car. Unplugged the two halves, plugged ths adaptor in. Tested the lights when the trailer was connected, everything worked perfectly!



by:

Pricing was extremely competitive and product quality was above my expectations. Harness was easy to install and worked as expected without any issues. Customer service at time of order was very good as well.



by:

This product was fairly easy to install. It took about 10 minutes. The only thing I think it needed was bigger zip ties. Overall I am pleased with it. Great product.



by:

Great product, easy install and instructions. Only 4 star because the bracket that I bought with it doesn't snap into it.



by:

Your products are working great, I have had no failures or problems with anything



by:
2018 Ford Explorer

Perfect fit for my daughter's 2018 Explorer. Easy installation. Great "how to" video available at UHaul website w/Lucy speaking.



by:
2015 Ford Explorer

Awesome product and company install went as shown in the video!! Etrailer is great.



by:
2013 Ford Explorer

Very straightforward installation, I watched a video online and it was just as easy as The video indicated!



by:
2013 Ford Explorer

Only had it a few days, but already loving it. Some cold weather and non-ideal working angle(see photos) made for an extended install on my '13 explorer base, but install was smooth as can be. Build quality seems second to none. Only thing left is to hook it up and take it for a spin!!

Only 1 thing regarding the matching T wiring harness: more zip ties please


Thanks guys and gals at etrailer !!



by:

It worked great hooking up lights on my 2018 Ford Explorer.



by:
2015 Ford Explorer

Well I am 74 years old and installed this hitch by myself using a floor jack and two jack stands. Took me a little longer than an hour since I had to work both sides. The video was extremely helpful especially the part about the strap to hold up the mufflers. I was able to set the hitch on top of the mufflers and then bolt oneside then the other. Really it took longer for me to get the wiring kit done than it did the hitch. I saved over $300 by doing it my self.

Thanks

C. O.

5/15/2018

It still great had no problems with it.



by:

Recently purchased the wiring harness for my new vehicle. I called customer service and the lady was very helpful in getting the right harness for me. The harness was MUCH easier to install than expected. I had an electrical short on MY end of the trailer connection that I got fixed (had nothing to do with the harness product), and the harness worked perfectly. Very satisfied with the product and support from the company. The video showing the installation process was very helpful.

Frank B.

7/10/2014

Still very pleased with the harness. I have used it multiple times and it is still perfect. Would absolutely recommend both the product and the company because of the quality of product and customer service


25
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Show More Reviews

See what our Experts say about this Tekonsha Custom Fit Vehicle Wiring

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    If your 2013 Explorer doesn't already have a trailer connector on it, it wouldn't have been wired for a brake controller. If you're planning on towing a small trailer that doesn't have brakes and uses a 4 pin trailer connector, the # 118540 wiring harness you'd looked at would be exactly what you need. Simply install that, and you're good to go. If the trailer has brakes, you would need to install a 7-way trailer connector and a brake controller. The easiest way to do this if you have...
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  • Plug Location for T-One Vehicle Wiring Harness on 2018 Ford Explorer
    The T-One Vehicle Wiring Harness part # 118540 if a fit for all models of a 2018 Ford Explorer. It will simply plug into a pre-existing port under the vehicle. I have attached some text from the instructions for you below as well. I have also attached an install video of this and a photo. Please note, on vehicles with two connectors, the wiring harness should be connected to the black factory connector; do not use the gray connector. 1. Locate the vehicle’s Tow-Plug harness underneath...
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  • Recommended Trailer Wiring Harness for 2014 Ford Explorer Without Tow Package
    Your Explorer might have the rectangular plug located to the right of the muffler on the passenger side of the vehicle (see linked video). If it does, you could use the # 118540 harness from Tow Ready. The harness is a plug and play install, pretty easy. If you do NOT have the connector, you'll need to hardwire the trailer connector in place using the # C59496 wiring harness. I've linked you to a video showing that harness being installed on a different vehicle. The procedure would be...
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    There are many different wiring harnesses on Police Interceptors, and the photo you've attached is not a common fit for trailer wiring. I don't believe that harness is for your trailer wiring even though it looks similar. I've attached two other photos to show you what the harness should look like and the connection that you will be making. Notice the center section has a groove for the harness that has a the corresponding raised divider. I've attached a video of the Curt T-Connector...
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  • Recommended 4-Flat Wiring Harness for 2016 Ford Explorer
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  • Installing Trailer Wiring on a 2014 Ford Explorer
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  • Trailer Wiring Compatibility with 2016 Ford Explorer Police Interceptor
    We install harnesses on many vehicles like the park ranger you mentioned and we have not seen any differences with the wiring harnesses on these Explorer models. I reached out to my tech contact at Tekonsha and he said that it is possible you are trying to connect the harness # 118540 to the incorrect connector because there are two that are very similar on the interceptors. He said there is a black connector and a gray connector that look very similar. The black connector is the one...
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    If you do not have the trailer towing package on your 2017 Ford Explorer then you will want to install the Tekonsha T-One # 118540 which will give you a 4-Way for your trailer lights. The Reese # 74682 that you referenced is for Explorers with the trailer towing package. Next you will want to install the Universal Wiring Kit # ETBC7. This kit will convert your 4-Way to a 4-Way and 7-Way and, once fully installed, will give you a fully-functioning 7-Way. I have attached a helpful video...
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  • Towing Components for 2013 Ford Explorer XLT 3.5L V6 to Tow Travel Trailer
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  • 118540 Trailer Harness on 2019 Ford Explorer Causing Blind Spot/Cross Traffic Monitor Malfunction
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