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

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

Part Number: 118408
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$68.42
Retail:$93.34
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Custom Fit Vehicle Wiring

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T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector 4 Flat 118408
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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. Circuit-protected converter guards against shorts. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118408 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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  • Reviews (119)
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Tekonsha Custom Fit Vehicle Wiring - 118408

  • 4 Flat
  • Custom Fit
  • Trailer Hitch Wiring
  • 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. Circuit-protected converter guards against shorts.


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 behind tail lights
    • Plug in T-connector
  • Includes circuit-protected tail light converter to ensure that your vehicle's wiring matches that of your trailer
    • Provides protection against electrical shorts and overloads
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage:
    • Stop/turn lights: 2.1 amps per circuit
    • Tail lights: 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 behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies to access this harness.


T-One Connection Location Points Behind Tail Lights

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.


Circuit-Protected Tail Light Converter

A tail light converter is built into this T-One connector. Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of your trailer. The tail light converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.


This converter safeguards itself and your vehicle against possible electrical shorts and overloads with integrated short circuit protection. Just install the connector as indicated and rest assured that the wiring system of your vehicle will remain feedback-free.



118408 Tow Ready T-1 T-Connector - 4 Wire

Installation Details 118408 Installation instructions

This Product Fits The Following Vehicles



California residents: click here



Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118408

Average Customer Rating:  4.9 out of 5 stars   (119 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. Circuit-protected converter guards against shorts.

by:

Easy install



by:
2010 Jeep Commander

great instructions and very easy to install!



by:

Great product, and very fast and easy to install.



by:

The quality products were delivered when stated and with no damage found. Thank you.



by:
2006 Jeep Commander

Item installed very easily, directions were good. Very Happy Thanks for everything again!



by:
Jeep Commander

The wireing harness was a great investment for my commander. I took about seven minutes to install and everthing worked great. Thanks!



by:
2006 Jeep Commander

Made the installation on my Jeep Commander quick and simple. Done in less than 30 minutes with no problems. Took longer to tie up wires than the install.



by:

Good Trailer wireing, Fast shipping, easy to install, would buy from this seller again. Thank you for service.



by:

my product was like three days early hooked it up tested it out worked perfectly easy install wentright back together the way it was originaly



by:

great contact,super fast shipeasy to use good instructions



by:

Recieved my order quickly, a couple of days. Install went just like the video showed. No problems.



by:
2006 Jeep Commander

2006 Jeep Commander towing wiring harness I was pleased with the description of the product online. The product came on time and the installation instructions were easy to read. I would highly recommend this site.



by:

Great product! Instructions were clear with illustrations. Took me about 20 minutes to install. would highly recommend if you need a harness. You can not beat the price from Etrailer.com!



by:
2006 Jeep Commander

Plug-N-Play installationEasy installation and the instructions were easy to follow - took about 15 minutes to install. This kit is different such that you DO NOT have to have the Daystar reprogrammed to accept the harness for the 2006 Jeep commander



by:
2015 Jeep Commander

Fit perfectly in my jeep commander and I had it installed in around 15 minutes. Very happy with this product and etrailer.com. Very helpful company and I will always order anything trailer related from them from now on!



by:
Jeep Commander

The kit was complete with clear instructions. The instructions also included tips to help avoid potential pitfalls during installation. The vehicle I installed lights on was a Jeep Commander and thus was a little more complicated than most. Due to a good product and clear instructions, I was done in less than 20 minutes from start to finish.



by:
Jeep

Very nice plug and play setup here. Many folks with the Jeep SUV's using the dealer wiring package have to have the Jeep "flashed" by the dealer to get the lights to work post install.

This was super easy to plug in, lights work as they should, no visit to the dealer to get a "flash".

I think I spent more time zip tying the excess out of the way than the actual install.

This is a great product. Definitely recommend it.


This was super easy to plug in, lights work as they should, no visit to the dealer to get a "flash".

I think I spent more time zip tying the excess out of the way than the actual install.

This is a great product. Definitely recommend it." />


by:

product working well. easy to install. took me 10 minutes. found it best to groung to black wire behind the light on the vehicle harness rather than with the body ground with the screw



by:

This hitch and wiring harness I purchased from etrailer was a breeze to install. It took me 30 minutes to do it by myself and only took that long because I had to slide in some shims on the hitch. Great product, great service. Thanks!!



by:
2007 Jeep Commander

The wiring kit was very good quality and fairly easy to install. The only issue I had was the wires feeding over to the passenger-side light was too short. Actually, if you stretched the wiring straight across back of bumper it did reach. However, if you wanted to do a better job and route with factory taillight wiring it would not reach. I finally decided to splice in a section of wire and do the job right.



by:
2007 Jeep Commander

Easy as pie, installed and zip-tied in 30 minutes. Unit should come with more zip-ties, I used about 12 ( maybe a few overkill ).

One thing I did was remove one of the 13mm bolts from the spare tire carrier to route the driver to passenger cable behind the metal carrier ( which follows the already present wire harness ). This made the install a little cleaner.



by:
2007 Ford Flex

I purchased the complete kit for my 2007 Commander.The Hitch was a breeze to install.I picked up 12' of 3/8' heat resistant flex tubing to protect and organize the wiring and with some extra cable ties had the whole job done in under to two hours.Great product.The order was shipped and arrived in under three days.The Communication was first class.I would recommend e trailer if you want to save on installation and do it yourself.You get the peace of mind that the job was done well.



by:
Jeep Commander

If you think you can hand wire a Jeep Commander and make it work...stop thinking and buy this wire harness. I tried to splice and hand wire the Jeep with no success. The brakes run separately from the turn signals on a Jeep Commander, which is why you cannot splice in trailer wiring. Simply plug in the wiring harness and presto, it works. Thanks eTrailer for the great value on this product.



by:
2006 Jeep Commander

I chose to use the OEM hitch and bezel for my Commander. I simply prefer the look. However, the OEM wiring is an absolute pain to install. It runs the entire length of the vehicle, and requires a computer flash from the dealer to make it work. I had the T-One harness installed in about a half hour, never used my wire stripper, and it works great. The kit looks to be of great quality, and the instructions were easy to follow. I would suggest a package of wire ties to secure everything. I finished off the installation with 30717 end connector. It mounted prefectly to the factory hitch, and gives an OEM look.



by:

One year later review. Everything hitch, wiring harness, receiver and ball even the rubber receiver cover are great. The product arrived timely and installed it with the help of floor jack (it’s heavy and I’m 69 yrs old) no problems. Holes were perfect and wire harness was plug and play. Very Happy


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Show More Reviews

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

  • Trailer Turn Signals Not Working with # C55050 Wiring Harness Installed on a 2008 Jeep Commander
    It sounds like you have one of two problems. First, I would check the wiring harness at the back of the vehicle. Disconnect the trailer and make sure the ground wire is connected to a clean, rust, paint and corrosion free ground location. Then using a circuit tester, item # PTW2993 if needed, test the wires going into the converter. The red wire should have the brake signal on it, the green wire should have the right turn signal on it, the yellow wire should have the left turn signal on...
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  • Recommended Wiring Harness For 2010 Jeep Commander Without Factory Tow Package
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  • Brake Controller Wiring on a 2008 Jeep Commander
    A brake controller will have no effect on your vehicle's Electronic Sway Control and the Electronic Stability Program. Any brake controller will work with your vehicle and will need to be hardwired in to the existing wiring on the vehicle. If your vehicle does not already have a 4-pole wiring harness located a the back of your vehicle, you would need to purchase the following parts: A T-Connector part number 118408, a Brake Controller Installation Kit, part number ETBC7, and a brake controller....
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    I went out to the warehouse to measure the bracket opening on Curt trailer hitch # 13414 for your 2008 Jeep Commander. It is 2-1/2 inches. Draw-Tite hitch # 75338 comes with some extra washers if there is an excessive gap between the hitch and where it attaches to the vehicle so you might consider it. If you plan on doing some towing I recommend etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch...
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  • Recommended Trailer Hitch, Wiring, And Ball Mount For 2008 Jeep Commander
    For your 2008 Jeep Commander, I recommend the Curt Trailer Hitch Receiver - Custom Fit - Class III - 2 inch # 13414. This hitch receiver installs with just 4 bolts and washers. It has a gloss black powder coat finish over a protective base coat for superior rust resistance. For your trailer wiring, I recommend the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118408. This harness connects to your factory wiring behind each of your tail lights. If your...
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  • Where Is The Factory Wiring Harness Plug On A 2008 Jeep Commander?
    Hello Mitch, thanks for reaching out. The # 20135 Multi-Plug T-One Connector Assembly you mentioned is made for a 2008 Jeep Commander and will only fit vehicles with a factory 7-way connector. The factory plug should be located under the bumper on the driver side. Your Commander did come with the factory 7-way correct? If so, the plug should be there on the drivers side. If your vehicle did not come with the factory 7-way, the factory plug will not be present. In this case you will need...
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  • Trailer Wiring Harness for 2006 Jeep Commander
    Since your Commander didn't come from the factory with a 7-way trailer connector, you'll want to use the # 118408 that you referenced. If you click the provided link, you can see an install video showing the harness being installed on a 2006 Commander. If you don't already have a ball mount and trailer ball for your trailer, you can easily figure out the drop needed by looking at the FAQ article I've linked for you. The ball mount you choose will have the appropriate trailer balls listed...
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    The Curt Trailer Hitch Receiver part # 13414 is indeed a fit for a 2007 Jeep Commander and it's available for purchase. It offers easy bolt-on installation and it has a hidden designed for the best overall look. I have attached an install video for you below as well. It should only take around thirty minutes. If you will be towing then you'll also need the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118408 which is plug-in-play and the etrailer Ball Mount Kit...
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  • Adding a 7-Way Trailer Connector and Brake Controller to a 2008 Jeep Commander
    We can get you set up with a 7-Way trailer connector and a brake controller for your 2008 Jeep Commander, no problem. First, you will need to install # 118408 which will provide the light functions to the 7-Way. Once that is installed you can then install # ETBC7. This will add the 7-Way, retain a 4-Way connector as well, and include the necessary components to hardwire in a brake controller. For a controller I recommend the P2 # 90885 because it is easy to set up and use and it is reliable....
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    The towing capacity numbers I found for a Jeep Commander 2010 5.7 Liter would easily allow it to tow a 3,200 lb trailer. You will need the Draw Tite hitch part # 75338 that you referenced. For wiring you will need to start with a 4-way (if you do not have one). For that you would want the # 118408. From there you would need to convert the 4-way to a 7-way so that you can install the brake controller. For that you will want the Brake Controller Install Kit and 7-Way Adapter part # ETBC7....
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  • Trailer Wiring Harness for a 2007 Jeep Commander
    If your 2007 Jeep Commander came with the factory tow package then it should have a factory 7-Way trailer connector at the back of the vehicle. You would follow this connector back to where it plugs in and that is where you would install # 118381. If there is no trailer connector on your Commander then # 118381 will not work. You would need to use # 118408 instead. I have linked the instructions and a video showing installation for you. Neither harness plugs into the back up sensor connector. I...
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  • Trailer Hitch, Drawbar, Hitch Ball, and Trailer Wiring Recommendations for a 2008 Jeep Commander
    I can certainly point out everything you will need to tow the boat with your 2008 Jeep Commander. First, you will need a hitch. There are several available but I recommend going with a Class III hitch rated for weight distribution because you never know what you might be towing in the future. I would go with Draw-Tite Trailer Hitch, # 75338. This is a Class III, 2 inch trailer hitch, capable of 500 pounds tongue weight capacity and 5,000 pounds gross trailer weight. When used with weight...
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  • Brake Controller Installation on 2008 Jeep Commander
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  • Brake Controller and Trailer Wiring Installation On a 2007 Jeep Commander
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  • Installation of Draw-Tite Trailer Hitch 75338 on a 2006 Jeep Commander
    You can find the torque requirements for Draw-Tite trailer hitch # 75338 in the instructions which I have linked below for you. We do not post them in case the manufacturer changes them. The instructions link though will always have the most up-to-date specs. If you plan on doing some towing I recommend etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8 inch ball,...
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  • 2006 Jeep Commander Trailer Hitch, Brake Controller, and Weight Distribution Recommendation
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    To install the Curt Trailer Hitch # 13414 on your 2007 Jeep Commander you will not need to trim or cut any section of your bumper or add any trim bezels. I attached installation instructions for this product for you to check out also. You also would not need to reflash the PCM of your vehicle either once you installed a Tow Ready Custom Fit Vehicle Wiring # 118408. You would have to reflash the computer if you were trying to install the factory tow package wiring harness on your vehicle...
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  • What is the towing capacity of Draw-Tite Class III trailer hitch and will fit my 2009 Jeep Commander
    The weight capacities of the Draw-Tite Class III Trailer Hitch Receiver, part number 75338 are 5000 pounds towing with 500 pounds tongue weight and if you have a weight distribution hitch 7500 pounds with 750 pound tongue weight. This is an excellent hitch for your Jeep Commander and will be more than adequate for a four wheeler on a small utility trailer. With this hitch you will also have the option of using many different accessories such as bike racks and cargo carriers. The hitch...
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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Andrew K
Video by:
Andrew K
Employee Kathleen M
Video by:
Kathleen M
Employee Jeff D
Installed by:
Jeff D
Employee Joshua S
Video Edited:
Joshua S
Employee Chris R
Video Edited:
Chris R
Employee Nicholas E
Test Fit:
Nicholas E
Employee Matthew S
Test Fit:
Matthew S
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Isabelle B
Updated by:
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