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

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

Item # 118409

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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 118409
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  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Tekonsha
  • No Converter
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. Call 800-298-8924 to order Tekonsha custom fit vehicle wiring part number 118409 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 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.


  • All Info
  • Reviews (281)
  • Q & A (62)
  • Videos (5)
  • Photos
  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118409

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 beneath the rear bumper
    • 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 at the rear of your vehicle, on both the driver's and passenger's sides. You will find the harness behind protective covers near the rear bumper.


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.



118409 Tow Ready T-1 T-Connector - 4 Wire



118409 Installation InstructionsInstallation Details 118409 Installation instructions

This Product Fits The Following Vehicles

1998 - 2003 Jeep TJ

1998 - 2003 Jeep TJ

1998 - 2003 Jeep Wrangler

1998 - 2003 Jeep Wrangler

2004 - 2006 Jeep TJ excluding Unlimited

2004 - 2006 Jeep Wrangler excluding Unlimited

2004 - 2006 Jeep TJ Unlimited

2004 - 2006 Jeep Wrangler Unlimited

2004 - 2006 Jeep TJ without factory 7-Way

2004 - 2006 Jeep Wrangler without factory 7-Way



California residents: click here


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


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




Video Transcript for Tekonsha Custom Fit Vehicle Wiring - Trailer Hitch Wiring - 118409 Review

Today we're going to review part number 118409. This is the tow-ready T1 vehicle wiring harness, with the four-pole flat trailer connector. Now this wiring harness is a custom-fit part number, it is designed to fit the 1998 to 2006 Jeep Wrangler and Jeep. What I would recommend is to go to the product page on our website of this part number, and at the bottom of the page, it'll show you the years and model vehicles that this will fit. This will quickly and easily install a four-way trailer connector on your vehicle using this custom wiring harness. The T-connectors right here will plug directly into your existing wiring, so there's no cutting, splicing or tapping into your wires. This will provided this four-way flat trailer connector at the back of your vehicle to power your trailer signal lights.

This four-way is compatible with five-pole, six-pole and seven-pole adapters that we do sell separately. It does connect quickly and easily, again no cutting or splicing the wires. Basically on the Jeeps, you'll just locate the connection points which are usually beneath the rear bumper, plug in these T-connectors, ground the white wire, and you'd be ready to go. It is constructed of a sixteen-gauge bonded wire. The four-way does come with this integrated dust cap right here, so when you're not using the four-way, just put the dust cap over it, push it down just to protect it. Then when you're ready to use it, just pop it off and plug in your four-way from your trailer. The specs on this harness, the max on the amperage you can use on this harness would be 7.5 amps per circuit.

This part number comes with everything shown here on the table, comes with the wiring harness, everything. Comes with a nice set of detailed instructions with some pictures, shows you how to install it. Comes with a couple of zip ties to secure any extra wire you might have, and it comes with a ground screw if you need it to ground your white wire. So basically what happens is these T1 connectors right here will plug into your vehicle's wiring harness. On the Jeeps, that's usually located at the rear of the vehicle on both the driver's and passenger's side. Usually you'll find the harness behind some protective covers near the rear bumper.

Basically what you do is pull the connectors apart, T these into them on the . green wire would be on the passenger's side, the yellow wire would be for the driver's side, so you just plug in the T-connectors there. You'll still have this white wire with the island on it. What you want to do is make sure this gets grounded to a good clean ground. You can use an existing screw that's on the vehicle, if not you can drill a hole and use the grounding screw that they include. Once the installation's complete, the four-way right here will be stowed beneath your vehicle near the trailer hitch as a length of wire, that you can extend it out and plug it in your trailer when you're ready to tow.

That should do it for the review, on 118409. It's the tow-ready T1 vehicle wiring harness, with the four-pole flat trailer connector. .


Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118409

Average Customer Rating:  4.9 out of 5 stars   (281 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.

- 118409
by:
2001 Jeep Wrangler

Great product, much better than those that cut into and attach to individual wires. Took about 30 minutes from beginning to end. 2001 Jeep Wrangler on the driver side the connections were made by removing the brake light assembly and on the drivers side the connections were made from below and behind the right tire. It was easy to drill the bumper with a hole saw making a nice out of the way connection to a one piece flat and round connector, see picture. 271274



- 118409
by:
2004 Jeep Wrangler

The product arrived as shown. Everything was packaged right, also great customer relations from begining to end. Very satisfied. Great old American service. US Army Retired Sgt. A. Soria 439270



- 118409
by:
2004 Jeep Wrangler

Installed on 2004 Jeep wrangler. Very easy to install. Ran the wires through bumper and added some electrical loom to help protect wires from the elements. Installation was fast and easy! Recommended! 241866



- 118409
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1999 Jeep Wrangler

Perfect fit. Plugs right into stock tail light harness. I now have trailer lights on my tj Jeep Wrangler. 686822



- 118409
by:

Fantastic product. Install could not be simpler, the hardest part was disconnecting the harnesses for each tail light as they had been connected for 14 years, but once that was done, the new wiring plugged right in and worked without any additional work. 683870



- 118409
by:

Prompt Delivery and product was easy to install. 679594



- 118409
by:

Proper fittings. Plug n play. Please that no addition wiring was needed. 671499



- 118409
by:

This wiring harness was so simple to install, It literally took me 15 minutes to install it, and it works great 667576



- 118409
by:

Extremely easy straightforward install plug and play 667007



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2002 Jeep Wrangler

Very good product,easy installation,good instructions,good price.couldn't ask for anything better Thank you etrailer. 659954



- 118409
by:

Great product, perfect fit, easy installation great instructions. Fast friendly service as always from etrailer.com!!! 657010



- 118409
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Works great. Very easy to install 637707



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2006 Jeep Wrangler

This harness fit perfectly on my 2006 Jeep Wrangler. Very easy to install and plent of extra wire to run it correctly. Has worked flawlessly. 628555



- 118409
by:

Wiring harness works well. Sometimes chasing down the connectors on the vehicle can be a challenge. Also, harness comes with a connector cover so don’t add that on to the list. 628016



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2003 Jeep Wrangler

Good product happy with service good qu ality 606560



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2001 Jeep Wrangler

Great product and works very well very happy ?? 606124



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1998 Jeep Wrangler

There was an issue with my existing wiring harness, low voltage coming from running light pin. Talked to customer service, id'd issue and I ordered this replacement. Worked perfectly, as expected. High marks, again! 604978



- 118409
by:

Fast shipping excellent price. Haven't put this one in yet. But the others I bought from them we're extremely easy installation. 601596



- 118409
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Great product 597281



- 118409
by:

Exactly as described. 596542



- 118409
by:

Very good descriptions Great price Came on time Install as Advertised 596537



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2005 Jeep TJ

Real good I insulate the wires and add water resistant grease to the conections and this work great on my tj 593099



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by:
1999 Jeep Wrangler

As described .Works well. 589930



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2003 Jeep Wrangler

Had trouble finding a wiring harness for my Jeep through my usual online stores. Bought this one and it arrived very quickly. Good installation instructions, a little confusing because of my Jeep An excellent deal for the price! Works perfectly. 585257



- 118409
by:

Product was delivered as described and ahead of schedule. It was easily installed, and working well, very satisfied. 584163



- 118409
by:
2003 Jeep TJ

Good product But finding the passenger side wiring can be tricky. If I had to do it all over again I’d buy the Hopkins one wire hook up. Don’t wait by the door for economy shipping either mine circled the globe before it arrived, but I enjoyed talking to CarolC @ etrailer about my package’s mini vacation. 582741



- 118409
by:

Excellent 576206



- 118409
by:
2004 Jeep Wrangler

Easy install 573000



- 118409
by:
2003 Jeep Wrangler

Still working great! 568046



- 118409
by:

I love that you guys give video tutorials to go with your products and they work!! 567381



- 118409
by:
2001 Jeep TJ

Absolutely turn key! This honestly took me 15-20 minutes to install. Instructions were easy to follow. Shipping was super fast. Highly recommended. 564396



- 118409
by:
1998 Jeep Wrangler

I just installed this with my hitch and it is of equal quality. 560328



- 118409
by:
2006 Jeep Wrangler

EXCELLENT PRODUCT. ONE HALF HOUR AFTER OPENING THE BOX I WAS DONE WITH THE INSTALLATION AND PUTTING TOOLS AWAY. IF I WAS MORE FAMILIAR WITH THE PUSH CONNECTIONS AND THE FIRST DRILL BIT WAS IN GOOD CONDITION IT WOULD HAVE GONE MUCH FASTER. IF I WERE TO DO THIS AGAIN I THINK I COULD GO FROM AN UNOPENED BOX TO ALL DONE , TOOLS PUT AWAY AND RELAXING INSIDE IN FIFTEEN MINUTES. SHIPPING WAS QUICK AND GEORGE KEPT ME UPDATED EVERY STEP OF THE WAY. IF YOU ARE THINKING OF USING THIS COMPANY...DO IT! 560012



- 118409
by:
Jeep

An easy install and works perfectly for my Jeep ! Thanks 555868



- 118409
by:
1999 Jeep Wrangler

Product was as described and delivered extremely quick. I would not hesitate to purchase from etrailer.com again. 550352



- 118409
by:
2004 Jeep Wrangler

Took me just a few minutes to install. Very easy, and clean set of wires. 525975


Comments

After some use this harness has held up well, and still works. Great product still.

Colin - 06/24/2019

57031

- 118409
by:
2004 Jeep Wrangler

Buy this for your Jeep I have 2004 Jeep Wrangler it works perfect don't want your time buying at other sites I did and it was thanks very much etrailer I will buy again 524961



- 118409
by:
1999 Jeep Wrangler

Easy to install there were no hidden steps or items to remove to make the install complete. 513949


Comments

Easy to install and doesnt require cutting and splicing.

Herb - 05/30/2019

55852

- 118409
by:
2005 Jeep TJ

My order came on time and complete. Videos made instal easy took me about 30 minutes. Will definitely tell friends to use etrailer.com for parts. 511004



- 118409
by:
2003 Jeep Wrangler

Thank you for the prompt delivery of the part that we needed for our Jeep. 506449



- 118409
by:
2004 Jeep Wrangler

Since I was installing new LED tail lights on my 2004 Jeep Wrangler I decide to install the T-One Vehicle Wiring Harness at the same time. The plug in connectors make the job a breeze ! 485729



- 118409
by:
2016 Jeep Wrangler

I previously bought a receiver for my 2016 Rogue and it fit perfectly and looks great. Easy to install also. The trailer wiring for my 2000 Wrangler TJ is the same. great products, good prices, quick delivery. 485006



- 118409
by:
2004 Jeep Wrangler

Product fit the vehicle exactly. Easily installed with no cutting or splicing. 484829



- 118409
by:

I've no problems with the connectors. Thanks 476142



- 118409
by:

Very Good product! 476001



- 118409
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Great product. 471164



- 118409
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No problem with product. Good company 468450



- 118409
by:

Excellent service and product. Customer service,shipping and quality excellent. Great choice. 465627



- 118409
by:
2001 Jeep Wrangler

Very satisfied with product and excellent service. Purchased on Friday afternoon and received product on Monday. 461321



- 118409
by:

Fits just like video shows. No problems, works perfectly. 460799


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Show More Reviews

Ask the Experts about this Tekonsha Custom Fit Vehicle Wiring

Do you have a question about this Custom Fit Vehicle Wiring?


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  • The reason the wiring harness of the Hopkins 7-Way Kit part # HM40975-11933 seems short is because it's for connecting to existing trailer wiring on your 2005 Jeep Wrangler. If your Wrangler did not have a 7-way present at the rear of it then this would not work. You will need to start with a 4-way (if you do not have one). For that you would want the # 118409. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way....
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  • Brake Controller Install on 2001 Jeep Wrangler
  • To install a brake controller on your 2001 Jeep, you will first need the T-1 Connector, part # 118409 if your Jeep does not already have a 4-way trailer connector. You will also need the Brake Controller Installation Kit, part # ETBC6 if you need a 6-way trailer connector, or part # ETBC7 if you need the 7-way. The install kits contain everything necessary for installing a brake controller on your vehicle. Finally, you will need to choose a brake controller. I would recommend the Tekonsha...
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  • 7-Way Trailer Wiring Recommendation for 2002 Jeep Wrangler
  • You will need to start with a 4-way (if you do not have one). For that you would want the # 118409. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller. This kit comes with everything needed to wire up the 7-way and install a brake controller. For a brake controller I would recommend the Prodigy P2 Brake...
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  • Which Trailer Wiring Harness To Use On A 2000 Jeep TJ Wrangler Sport
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  • Parts Needed to Add 7-Way to 2006 Jeep Wrangler Rubicon
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  • Wiring Fit and Compatibility on a 2006 Jeep Wrangler-X
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  • Availability of Trailer Wiring Harness for a 1997 Jeep Wrangler TJ
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  • Tips for Installing a Trailer Wiring Harness on a 2005 Jeep Wrangler
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  • How to Install 7-Way Metal Trailer Connector and Wiring Harness for a 1999 Jeep Wrangler
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  • Trailer Wiring and Hitch Recommendation for a 1999 jeep Wrangler
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  • Parts Needed to Add 7-Way Wiring & Brake Controller to 2000 Jeep Wrangler
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  • Recommended Brake Controller Wiring For 2006 Jeep Wrangler
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  • Troubleshooting Trailer Wiring Harness Blowing Fuses on a 2006 Jeep Wrangler
  • Both of the wiring harnesses we have available for the 2006 Jeep Wrangler, will work on your Jeep. The difference is that one is manufactured by Tow Ready, # 118409, and the other is manufactured by Hopkins manufacturing, # 32625, and that different connection points are used by the different manufacturers. It sounds like you might have one of several problems. First, check the connectors in your existing trailer wiring harness and on the Jeep to make sure that none of the pins are bent,...
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  • Replacement Wishbone Trailer Connector To Replace 6-wire Connector
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  • Recommended Replacement 4-Pole Wiring Harness for 2009 Ford Escape
  • The most common cause for multiple trailer lights to come on when only one function is activated is a bad ground on the trailer side. But since the trailer is new and since you tested your truck's trailer socket and found the problem to be there as well, this suggests that your wiring harness is all done and should be replaced. If your Escape did not come with a factory tow package you can use Tow Ready harness # 118551. If it does have the factory tow package instead use wiring harness...
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  • Trailer Wiring Recommendation for 2005 Jeep Wrangler Unlimited
  • We can guarantee that the Tekonsha Trailer Wiring Harness part # 118409 is a fit for your 2005 Jeep Wrangler Unlimited. I attached an install video that shows this harness installed on a 2005 Wrangler just like yours.
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  • Troubleshooting a T-One Tow-Ready Hitch Wiring Adapter # 118409 Not working Properly
  • If the vehicle lighting is working properly with the trailer wiring harness # 118409, installed and no trailer connected, the problem could be that you have the wires from the harness connected on the wrong sides of the vehicle or you have a problem with the wiring on the trailer. I suspect that there is a bad ground connection on the trailer and that when the trailer is connected the problems that arise will go away when the ground fault is corrected. Check the connection of the white...
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  • Parts Needed to Install a Brake Controller in a 2003 Jeep Wrangler
  • A brake controller will help you tow a trailer in a safe manner, but it won't give you additional towing capacities beyond what the vehicle has already. You will need to start with a 4-way (if you do not have one). For that you would want the # 118409. 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. I attached installation instructions and...
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Info for this part was:

Test Fit:
Joe V
Photos by:
Theodore B
Expert Research:
Michael L
Video Edited:
Zack K
Expert Research:
Robert G
Expert Research:
Patrick B
Expert Research:
Michael H
Installed by:
Jeff D
Expert Research:
Jameson C
Video Edited:
Joshua S
Video Edited:
Jacob T
Expert Research:
Adam R
Updated by:
Laura H
Updated by:
Sarah W
Updated by:
Alexander C
Updated by:
Isabelle B

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