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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 # 118416
Our Price: $24.31
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Custom Fit Vehicle Wiring

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Tekonsha No Converter Custom Fit Vehicle Wiring - 118416
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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. 1-636-306-4830 to order Tekonsha custom fit vehicle wiring part number 118416 or order online at 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 (381)
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  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118416

  • 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.


  • 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 driver's-side tail light
    • Plug in T-connector
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


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


This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located behind the driver's-side tail light. You will have to remove the tail light assembly 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.

118416 Tow Ready T-1 T-Connector - 4 Wire

Installation Details 118416 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 - 118416

Average Customer Rating:  4.9 out of 5 stars   (381 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.


Great harness it did what I wanted it to. I was putting a 2nd set of break lights on my Jeep Wrangler with reverse. As you can see from the pictures the install went well and they look great. Customer service was very knowledgeable and helpful

Wire harness is working great
PATRICK V - 09/07/2021


Ordered a trailer wiring harness for my vehicle. I got exactly the right wiring kit with easy to follow instructions. The wiring kit installed easily and worked perfectly for my application.

After a year in service, the product is still performing perfectly! Thanks for a great product!
Steve J - 02/10/2017


After one year, wire harness is still holding up and i use my trailer weekly with Lights!

2014 Jeep Wrangler

Patrick, I received the order on time and the product was a quality item and installation was a breeze. Installed the hitch on my jeep and the wiring harness in less than 20 minutes.

2017 Jeep Wrangler

Haven’t installed it yet, however, the kit is solid and well made. Instructions were easy, pretty much a beginner install.


Quality product and easy installation

2013 Jeep Wrangler Unlimited

So far so good. Installed just like the video showed. This is the third vehicle ive used you products on and they all worked perfectly

2013 Jeep Wrangler

I was very happy with the harness -- it installed quite easily in spite of the fact that I had wired the Jeep up to be towed by my RV years before. This meant that I had already spliced in with wires and diodes, and the cavity behind the tail light was filled with dirt and dried mud from stream crossings made during the past 10 years. Anyway, after getting rid of the dirt and stuff, I found the connector plug shown in the directions and a couple of clicks and everything worked as advertised. I would recommend getting the bracket for mounting the female receptacle at the hitch -- it bolted right up. Also, get some longer zip ties to secure the harness to the frame and keep it away from the muffler.


Exact fit, simple installation. Quick shipping, great price, great customer service, keep you updated at every step of the transaction.


Easy to install, no need to cut wires or break any tab. I bought an « L » bracket and attached it on the Draw Titr hitch and the final look is close to an OEM quality.


Great product. Easy to install. I would definitely buy again. Emailer is the best, they never disappoint.


It all worked out and fit with no issues! The video was great to show a visual of what needed to be done.


Finally got the correct wiring that was needed, thank u so much.


Very easy install.


I have had this wiring harness installed for a year without any issues.
The installation was smooth with the biggest issue being fishing the wires thru the frame. Nice clean installation.


Everything I ever bought from you guys worked as it should. Thanks for the good service.

2016 Jeep Wrangler

Installed in about an hour on a 2016 Jeep Wrangler willy's wheeler. Perfect fit, steal
Of a deal.


Wiring adapter fit perfect, made for a very easy installation

2010 Jeep Wrangler

Plugged it in, and it worked great. Took about 20 minutes.

2014 Jeep Wrangler

items delivered as ordered and in a timely manner


The items was great work perfect


Just like the YouTube video, it was super easy to install. Product description was accurate and harness works great! I'd highly recommend. The only negative I would say is that the information wasn't that detailed when tracking the shipment, but I'm also one of those that likes to know exactly where my shipment is. I would highly recommend

HK - 06/12/2017


Fits perfect. I put it to use an hour after I received it.


Gregory advised me on what part numbers I needed to install the wiring for trailer lights and brakes along with a needed brake controller. All the equipment arrived a day early. With the instructions provided and instruction videos from etrailer I successfully installed all the wiring, 7-way plug, brake controller and light harness in a day.

Thank you etrailer!!


Plug and play very easy to install

Show More Reviews

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

  • Ground Wire of Tow Ready # 118416 Versus Equivalent MOPAR Part
    It appears that the OEM MOPAR part draws its ground connection through the connection with the factory wiring harness feeding the taillight assembly. Rather than depending on getting the ground connection through the factory harness, the Tow Ready harness simply does the same thing by grounding directly to the vehicle chassis. Either the OE or the Tow Ready harness would work just fine for you, both will provide the same function. Price-wise, from what I say online, the Mopar harness costs...
    view full answer...
  • Will Tow Ready Wiring Harness 118416 Fit a 2016 Jeep Wrangler
    Yes, the trailer wiring harness by Tow Ready part # 118416 that you mentioned is a confirmed fit for your 2016 Jeep Wrangler and would work well. I attached an install video that shows the harness installed on a similar 2015 Wrangler as yours as well.
    view full answer...
  • Recommended Trailer Wiring Harness for 2017 Jeep Wrangler
    Your 2017 Jeep Wrangler features a combined wiring system, which means that the brake and turn signals are indeed sent along the same wire. So you are absolutely correct - the same wire on your Jeep will control both the turn signal and brake light function. For a custom-fit wiring harness, I recommend the Tekonsha T-One Vehicle Wiring Harness # 118416 if your Jeep does not have the factory tow package. This harness will actually connect directly to built-in ports behind the driver side...
    view full answer...
  • Installing Trailer Wiring Harness on 2018 Jeep JL Wrangler Thats Also Wired for Flat Towing
    You can absolutely install the Tekonsha T-One Vehicle Wiring Harness # 118786 (which is indeed the correct harness for your 2018 Jeep JL Wrangler) on your vehicle that already has a Blue Ox Diode Kit installed for flat towing. The two kits won't interfere with each other and won't cause any type of issue with regards to the electrical system on the Jeep. When installing the T-One Harness you will follow the attached instructions just like normal, connecting the plugs to the factory ports...
    view full answer...
  • How Long Does it Take to Install Trailer Wiring Harness # 118416
    The install for the trailer wiring harness part # 118416 is pretty quick and painless. If you check out the install video I attached you can see how quickly our installers got through it. If you are trying to make sure you set aside enough time though I'd give yourself an hour to get through it as the first time you install anything typically takes a bit longer. Most likely you'd get it knocked out in half an hour though.
    view full answer...
  • Trailer Wiring That Fits A 2011 Jeep Wrangler
    For your 2011 Jeep Wrangler, I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118416. This is confirmed to fit your 2011 Jeep Wrangler, and will simply plug into your vehicle's factory wiring harness, eliminating all cutting or splicing.
    view full answer...
  • Trailer Wiring Harness for 2012 Jeep Wrangler
    If you are in need of trailer wiring it's a very safe assumption that the 2012 Jeep Wrangler does not have the tow package so the trailer wiring kit you'd want is the Tekonsha part # 118416 which installs easily by plugging inline with the taillight connectors.
    view full answer...
  • Hitch and Trailer Wiring Installation Procedure for 2014 Jeep Wrangler
    For a trailer wiring harness, I'd recommend the Tow Ready # 118416. The installation procedure for the wiring harness and the Curt Class III Hich # 9883544 on a 2014 Jeep Wrangler would be exactly the same as that shown in the linked video showing the hitch being installed on a 2013 Wrangler. There might be minor changes between the 2013 and 2014 model year, but they don't affect the hitch installation in any way.
    view full answer...
  • How to Install Trailer Wiring 6-Way on a 2017 Jeep Wrangler Unlimited
    You'd need to start with a 4-way. For a 4-way confirmed as a fit for your 2017 Jeep Wrangler Unlimited you'd want the part # 118416. If your trailer has a 6-way round connector the correct adapter you would need is the part # 30637. Your vehicle 4-way will plug directly into the 4-way of the adapter and then the taillight signals will be converted to a 6-way.
    view full answer...
  • Converter Required to Add Additional Brake Lights to 2017 Jeep Wrangler Unlimited
    I can help you pick out the types of products you'd need to accomplish what you need, but you'll have to find out exact correct way to install everything per you setup. The best solution is going to be to use a converter like the # 118158 to separate out your vehicle turn taillight wiring so that you have dedicated stop light circuit. Since you want to add stoplights you'd have to use the wires of this kit to Tee into the wiring of your vehicle so that it can have it's taillights still...
    view full answer...
  • Correct Trailer Wiring Harness for 2018 Jeep Wrangler JL Unlimited
    Tekonsha confirms that the correct T-One wiring harness for a 2018 Wrangler Unlimited JL is part # 118786. The # 118416 harness you'd looked at is a fit for the JK model, and wouldn't work with your JL, as 2018 was a split model year for the Wrangler where Jeep produced both the first model year of the JL and the final model year of the JK. I've linked to an installation video for you.
    view full answer...
  • 2013 Jeep Wrangler Unlimited 5-Way Trailer Wiring Harness Recommendation
    If all you need is a 5-way for your 2013 Jeep Wrangler Unlimited what you'll need is a custom fit 4-way like the Tekonsha kit part # 118416 and then to convert it to a 5-way part # 20036 and you'd be set. The part # 118416 installs by attaching inline with the taillight connectors of the Jeep and then the # 20036 plugs into the 4-way and allows you to run the 5th wire to the reverse light circuit of your vehicle and you have a functioning 5-way.
    view full answer...
  • Wiring Harness for 2017 Jeep Wrangler Unlimited without Factory Tow Package
    The reason that the Hopkins Plug-In Simple Vehicle Wiring Harness # 33515 keeps tripping out the computer on your 2017 Jeep Wrangler Unlimited is because this harness is not a fit for your vehicle; it is only a fit for 1998 - 2004 Nissan Frontiers, 1998 Nissan Quests and 1998 Mercury Villagers. For your '17 Wrangler Unlimited, it seems likely you do not have the factory tow package so for that I recommend using the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118416....
    view full answer...
  • Recommended 4-Way Trailer Wiring Harness for 2019 Jeep Wrangler Unlimited
    The correct Tekonsha 4-Way harness for your 2019 Jeep Wrangler Unlimited is the T-One # 118786. This will plug right into factory ports behind the driver and passenger side tail lights. The included powered converter then needs to be ran up to the Jeep's battery to safeguard the vehicle's wiring and ensure enough power gets back to the trailer lights. This will provide you with just the needed 4-Way connector to activate the trailer's basic signal lights (without brake or 12V power functions)....
    view full answer...
  • Recommended Trailer Wiring Harness For A 2016 Jeep Wrangler Sport
    When installing a trailer wiring harness on your 2016 Jeep Wrangler Sport The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118416 is the correct harness for you. This wiring harness plugs into your vehicle's wiring harness, which is located behind the driver's-side tail light. Once installation is complete the 4-way flat connector will be sowed beneath your vehicle, near the trailer hitch The 4 flat mounting bracket # 18144 is recommended to keep the connector secure....
    view full answer...
  • How to Add 5-Way Trailer Connector on 2016 Jeep Wrangler
    The best way to add a 5-Way connector to your 2016 Jeep Wrangler is by using the Tow Ready Adapter # 20036. This plugs into an existing 4-Way on your vehicle, like the T-One # 118416, for the basic trailer light functions, and then you splice in the blue wire to the reverse light circuit on your Wrangler so that function is then sent to your trailer. Attached is a review video of the Tow Ready adapter as well as an installation video of the T-One wiring harness in case you don't already...
    view full answer...
  • Running a T-One Vehicle Wiring Harness to the Outside of Jeep
    It is an easy process to install the wiring harness; I will quickly go over the steps, but also attach the instructions in a PDF file for your convenience. You are correct with assuming you use the taillights. Start on the driver's side, remove taillight, and plug harness in; next ground the harness with the white wire. Route the T-Connector end with the 4-flat down through the taillight pocket between bumper and body and towards the center of the bumper. Secure remainder of harness with...
    view full answer...
  • Will Curt Hitch 9883544 Fit a 2010 Jeep Wrangler Unlimited Sport 4 Door
    Yes, the Curt # 9883544 hitch will fir your Wrangler Unlimited Sport. I have added a link to the instructions below for you to review. I also included a link to the wiring for your Wrangler if you will be doing any towing or using lights on a cargo carrier. To complete the towing set up I also recommend etrailer ball mount kit # 989900. It comes with 2 ball mounts, 2 balls, a hitch pin with clip, and a storage bag.
    view full answer...
  • Can Hopkins Tow Bar Wiring HM56200 and Trailer Wiring Harness #118416 be Used Together
    The Hopkins # HM56200 and the Tow Ready # 118416 can indeed be used together without any problem. I have linked you to some FAQ articles about flat towing and an install video for the Hopkins wiring harness that you might find helpful.
    view full answer...
  • Wiring Harness Not Functioning Properly on 2014 Jeep Wrangler Unlimited with Right Hand Drive
    Wiring for standard domestic production vehicles may differ from that in vehicles produced for markets outside the U.S. If your Jeep Wrangler Unlimited was produced for another market its wiring could be different and this could explain the issue with the lack of power to the right-hand turn signals using wiring harnesses you've tried. Several of the 4-pole harnesses we offer for your 2014 Wrangler Unlimited, part # 118416 from Tow Ready and # C55124 from Curt, are noted as possibly requiring...
    view full answer...
  • Trailer Hitch for a 2014 Jeep Wrangler Unlimited X Rubicon
    The rear bumper on the 10th anniversary edition of the 2014 Jeep Wrangler Unlimited is different than regular models and the Curt trailer hitch, # 9883544, will not fit with that alternate bumper. Draw-Tite trailer hitch # 76104 will fit all models of the 2014 Jeep Wrangler except Limited Edition models. I have included a link to the installation details and a link to a video showing an installation for you. To complete the towing set up I also recommend etrailer ball mount kit # 989900....
    view full answer...
  • Trailer Hitch and Wiring for a 2012 Jeep Wrangler Unlimited
    Curt trailer hitch # 9883544 does indeed fit your 2012 Jeep Wrangler Unlimited. I have linked a video showing an example installation for you. 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, 2 inch ball, hitch pin with clip, and a storage bag. If the ball mount kit does not have the right rise or drop to...
    view full answer...
  • Comparing Curt T-Connector Wiring Harness and Tow Ready T-One Wiring Harness for 2011 Wrangler
    The only difference between the Curt T-Connector Wiring Harness, # C55124, and the Tow Ready T-One Vehicle Wiring Harness, # 118416, is that they are made by two different manufacturers. They are essentially the same exact wiring harness coming from two different companies. Both Tow Ready and Curt are reputable companies so you will not be sacrificing quality with either harness. When deciding which harness to purchase, I would go with the least expensive option to save money. I have attached...
    view full answer...
  • Is a 4-Way Trailer Wiring Harness Mounting Bracket Recommended for a 2007 Jeep Wrangler
    It is not required to have a mounting bracket for the 4-Way end of trailer wiring harness # 118416, but we do recommend it for a secure and professional appearance. You can use bracket # 18144 with either the short extension # 18140, or the long extension # 18136. I have included a link to a video that shows, in part, the installation of the mounting bracket.
    view full answer...

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