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  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. Powered Converter
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

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

Item # 118599
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Custom Fit Vehicle Wiring

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Tekonsha Trailer Hitch Wiring - 118599
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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. Powered ModuLite reduces strain on wiring system. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118599 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.
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  • Reviews (37)
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  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118599

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Powered 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. Powered ModuLite reduces strain on wiring system.


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
    • Locate connection points in trunk
    • Plug in T-connector
    • Run hot lead to car battery
  • Includes ModuLite to ensure that your vehicle's wiring matches that of your trailer
    • Powered module connects directly to battery to avoid overloading vehicle's electrical system
  • 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: 5.6 amps per circuit
  • 1-Year limited warranty


Installation

This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located inside your trunk, behind the tail lights on both the driver's side and passenger's side. You will need to remove the threshold panel and some of the trunk liner to access the harness. Once you've plugged in the T-connector, run the hot lead with the attached fuse holder up to your car battery. Connect the fuse holder to the positive terminal on the battery and insert the provided fuse.


Once installation is complete, the 4-way flat connector will be stowed within your trunk.


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.


ModuLite Powered Tail Light Converter

A ModuLite power module 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. This power module functions as a tail light converter to combine 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.


With a ModuLite, your trailer's lights will be powered without overloading your vehicle's electrical system. Because the module draws power directly from your car's battery and bypasses the electrical routes that are used by a basic wiring harness, there is virtually no draw on your tail light circuits.



118599 Tow Ready T-1 T-Connector - 4 Wire - Modu-Lite

Installation Details 118599 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 - 118599

Average Customer Rating:  4.8 out of 5 stars   (37 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. Powered ModuLite reduces strain on wiring system.

by:
2022 Ford Explorer

This company is awesome! They give out out tons of information on how to pick the right parts and install them and install them. Plus the prices are very fair and and delivery service was fas it was fast. My trailer hitch fit perfect and the wiring harness was easy to install thanks to the videos. I highly recommend etrailer and will definitely be using them again for all my automotive needs.




by:
Ford Explorer

Works great. Video and guidance from etrailer was critical to installing. Nice quality. 2021 Ford Explorer.




by:
2013 Ford Taurus

t-1 harness is a needed upgrade. a great product FOR MY 2013 TAURUS SHO




by:
2020 Ford Explorer

All parts fit as designed. The instructional videos made installation error proof.




by:

This product came as advertised and the instructional videos to install it yourself were the best. Great quality and user friendly




by:

Thank you so much. Got here so fast.




by:
2021 Ford Explorer

For me the worst thing was running the power wire to the battery. Harness was plug and play and was able to conc by eal power module and wires behind pannels in the back. Was able to run through a body plug the 4 pin connector to the hitch and conceal. Glad I don’t have to do that again.




by:

Worked for a while, then fried out during my move with the uhaul. Wasn’t the uhaul, as the uhaul lights worked correctly when hooked up to another vehicle. Disappointed.


Comments
This wiring harness is confirmed as a fit for your Taurus. It does have a maximum amp of 2.1 amps per stop and turn lights circuit and 5.6 amps for the tail light circuit. It may just be the in-line fuse, I recommend checking that to see if a new fuse would correct the issue. Other than that most trailer wiring issues are related to a bad ground somewhere in the system. I have included a help article regarding this for your reference.
-- Etrailer Expert Rachael H - 07/29/2019


by:

This kit made wiring the trailer connector fast and easy.




by:
Suzuki Swift

I have not install the products yet, however the shipping was swift. The products appear to be of top quality.




by:

Pictures not accurate, must be from a 2020 not 2021. Must take almost all panels back off to get to plugs. Still trying to figure how and where I get power from battery




by:
2013 Ford Taurus

Excellent trailer hitch and wiring harness. I am a novice at car mechanics and watched the etrailer Youtube videos and installed both pieces in a little over an hour. Products work perfectly and easy to install. Thanks!




by:

Hitch for my 2020 Explorer shipped immediately, was well made, and included the wiring. The cost for this hitch and the installation was less than the factory hitch, and it is does not require having to pull off a section of the rear bumper fascia every time you want to install the hitch.




by:

I received my trailer wiring harness very promptly. The harness was well designed and manufactured. I would recommend this product to anyone looking to add trailer lights to their vehicle.




by:

I could not believe how quickly the hitch was delivered. And is already installed and working good. The customer service representative was very helpful in assisting me in picking out the correct hitch for my needs.




by:

Great Hitch. Ordered from etrailer for $189 and local shop wanted over $400 for the exact same item. Bolted right on and it only took about and hour to be "tow ready". Great prices, Great shipping!

Thanks!




by:

Product is good. Teconsha was a customer of mine when I was working. Etrailer service, web site, installation instructions, and video help are all excellent. Oops, for got shipment tracking, also excellent.




by:

Good product, have not installed yet but I am sure if will be just what is needed to perform the job.




by:

Plug and play, what could be easier. Excellent install videos by etrailer, keep up the great work.




by:
2015 Lincoln MKS

Excellent service great products great price's. extra fast shipping




by:

Very satisfied with this product. Good quality. Highly recommend.




by:

Wiring worded great..easy to install..highly recomend




by:
2020 Ford Explorer

Fast shipping, smooth transaction, I received exactly what I ordered. Thanks!




by:




by:



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Show More Reviews

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



  • Installing a Trailer Wiring Harness on a 2013 Ford Taurus SHO
    For the easiest installation, the trailer wiring harness that I recommend for your 2013 Ford Taurus SHO is the Tow Ready T-One Harness, # 118599. This harness does not require any cutting or splicing into your vehicles electrical system and it uses power from your vehicle's battery to power the trailer lights. This eliminates the potential for blowing tail light fuses on your vehicle. If you are somewhat familiar with hand tools and have a basic understanding on how to dismantle interior...
    view full answer...
  • Can Trailer Wiring Harness For 2012 Ford Taurus be Run to Spare Battery in Trunk
    The Tekonsha T-One Vehicle Wiring Harness # 118599, which is what I recommend for your 2012 Ford Taurus, will connect to existing ports located inside the trunk and a hot lead with attached fuse holder will then need to be run up to your vehicle battery. Running the power wire to your primary vehicle battery under the hood is going to be your best option, as the battery will be charged by the alternator and will provide a reliable source for the harness. This is the safest way to install...
    view full answer...
  • Trailer Wiring Harness for 2022 Ford Explorer without Tow Package
    If your 2022 Ford Explorer did not come from the factory with tow package, you will need the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector, # 118599 from Tekonsha. This custom-fit T-One connector plugs into your vehicle's wiring harness behind the tail lights on both the driver's side and passenger's side. Then simply run a hot lead with the attached fuse holder up to your car battery. Please note the linked product review and installation video below.
    view full answer...
  • Best Trailer Wiring Harness for 2022 Ford Explorer
    For your 2022 Ford Explorer the best trailer wiring harness is the Tekonsha part # 118599 as it installs very easily and has the most reliable converter box of all the kits available.
    view full answer...
  • Does Power Wire of Tekonsha Trailer Wiring Harness # 118599 Have to be Ran
    The Tekonsha trailer wiring harness part # 118599 will not work without the power wire connected. This converter box is designed to protect the taillight circuits of your tow vehicle by only using them for signal but then drawing power from the vehicle battery instead to power the lights. This means a trailer wiring short won't hurt the vehicle wiring.
    view full answer...
  • Where to Run Power Line When Installing Tekonsha Trailer Wiring for 2017 Ford Taurus
    When we installed the Tekonsha trailer wiring harness part # 118599 we ran the power wire underneath the vehicle avoiding any hot exhaust or moving components. If you check out the attached install video link you can see the entire process outlined and exactly where we ran the wire.
    view full answer...
  • 2 inch Trailer Hitch Recommendation for 2013 Ford Taurus AWD
    I spoke with my contact at Draw Tite and he confirmed that the # 75670 is a confirmed fit for your 2013 Ford Taurus with AWD. This is also a Class III hitch with a 2 inch opening like what you are looking for too. For trailer wiring you then would want the # 118599 which is a confirmed fit as well. I attached an install video for this for you to check out as well.
    view full answer...
  • Trailer Hitch Receiver for 2020 Ford Explorer That Allows Use of Hands Free Liftgate
    The trailer hitch receiver that will work with your 2020 Ford Explorer, and will let you keep on using your hands free liftgate sensor is the Draw-Tite Trailer Hitch # 76320. What you may need to do is simply kick your foot to one side of the receiver portion of the hitch as opposed to directly in the center, but the feature will absolutely still work. Along with the Draw-Tite hitch, if you plan on towing with your 2020 Ford Explorer, you'll need a wiring harness, the T-One Vehicle Wiring...
    view full answer...
  • Trailer Hitch that Fits all Models of 2020 Ford Explorer
    I checked with Draw Tite just now and the hitch part # 76320 that you referenced does fit your 2020 Ford Explorer LTD 2WD as Draw Tite states it fits all models of the 2020 Explorers. If you also need trailer wiring we have the Tekonsha kit part # 118599 as well which installs easily and has a very reliable converter box as well.
    view full answer...
  • Trailer Wiring and Hitch for 2020 Ford Explorer without Tow Package
    Since your 2020 Ford Explorer does not have the factory towing package the trailer wiring harness you'll need is the Tekonsha part # 118599 which plugs inline with the taillights of the vehicle to give you a 4-way. This would work great with the mostly hidden Class III Draw Tite hitch part # 76320 that you are considering. I attached install videos for both the hitch and the wiring for you to check out as well.
    view full answer...
  • Trailer Hitch Receiver Fit For 2020 Ford Explorer Limited
    There is absolutely a trailer hitch receiver that fits your 2020 Ford Explorer Limited (or LTD), and I did verify with the manufacturer for you that it is a fit: - Draw-Tite Max-Frame Trailer Hitch Receiver # 76320 While I can't speak for why your Ford dealer said there wasn't a hitch for this vehicle, I can tell you with 100 percent certainty that the # 76320 will definitely not damage your Explorer's computer or wiring.
    view full answer...
  • How Much Does the Draw-Tite 76320 Hitch Receiver Weigh?
    The Draw-Tite Max-Frame Trailer Hitch Receiver item # 76320 weighs 45 lbs. If you are looking for a wiring harness for your 2020 Ford Explorer I recommend the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector item # 118599.
    view full answer...
  • 4-Way Flat Vehicle Wiring Harness For a 2022 Ford Explorer Without Factory Trailer Wiring
    The Tekonsha T-One Vehicle Wiring Harness # 118599 will give you a 4-way flat connector for your utility trailer to connect to your 2022 Ford Explorer. This harness uses factory style connectors so you will not have to splice into the tail light wiring on your Explorer. The Mounting Bracket # 18144 will allow you to secure the 4-way connector on the back of your Explorer to prevent it from becoming damaged if you choose to route the connector outside the vehicle rather than running it...
    view full answer...
  • Trailer Hitch Fit for 2020 Ford Explorer and Fascia Trimming Needed to Install
    There is a trailer hitch that fits a 2020 Ford Explorer, the Draw-Tite Trailer Hitch Receiver # 76320, which is a Class III hitch with a 2" receiver, 6,000 lb towing capacity and 900 lb tongue weight capacity. As you can see from the cut outs I added from the linked installation manual, this hitch will rest neatly underneath your Explorer's bumper to retain its clean appearance, but some slight fascia trimming is required. Just a 3-1/4" x 5" section needs to be trimmed in order for the...
    view full answer...
    Image 1 for Image 2 for
  • Recommended Trailer Wiring for 2013 Ford Taurus Police Interceptor
    I recommend the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 119190KIT for your 2013 Ford Taurus Police Interceptor trailer wiring. This will give you a 4-way flat connection that will allow you to work with the unique wiring of a police interceptor and draws power directly from the vehicle battery to protect your electronics. There is not a harness that will plug into factory wiring for your vehicle because it isn't a standard model. This kit will allow...
    view full answer...
  • What Does all Pins of 4-Way Harness having Power When Vehicle is off Indicate
    What you described is a shorted out trailer wiring converter box. When all of the pins are hot all of the time that indicates that the box had an internal short and it needs to be replaced. The Curt harnesses are known to short out a bit easier than the Tekonsha kits like part # 118599 which is a fit for your 2014 Ford Taurus so this would be what I would recommend for your replacement. Be sure to go over your trailer's wiring to determine if there are any obvious shorts on it's wiring...
    view full answer...
  • Recommended Installer for Draw-Tite Trailer Hitch on a 2020 Ford Explorer
    The Draw-Tite Max-Frame Trailer Hitch Receiver part # 76320 is indeed a confirm fit for a 2020 Ford Explorer. If you will be having the hitch installed for you then you can expect to pay around one hour to one and half hours of the shop's labor rate. The shop's labor rate can vary but is usually around one-hundred dollars per hour. In regards to a recommended installer, we suggest a local rv dealer with service center as they will be most experienced with these types of installs but most...
    view full answer...
  • Will Trailer Hitch for 2020 Ford Explorer Interfere With Hands Free Liftgate Sensors
    According to Draw-Tite, their # 76320 hitch will not prevent the liftgate sensors from sensing movement. However, the sensors behind the center of the bumper will not work once the hitch is installed. This means you'll need to wave your foot under the vehicle a few inches left or right of center in order for the sensors to pick up the movement. If you'll be towing, you'll need a few other items to complete your towing system, a trailer wiring harness, part # 118599. You'll also need a...
    view full answer...
  • Hitch and Wiring For 2020 Ford Explorer To Tow Boat Trailer
    Since the 2020 Ford Explorer is a new generation (sixth generation) of Explorers the hitches do fit differently. The only Class III hitch available (as of 12/26/2019) is the Draw-Tite Max-Frame Trailer Hitch Receiver part # 76320 which is a concealed cross tube design. The only portion of the hitch that is visible once installed is the receiver square so there is some fascia trimming required to install it. The installation requires trimming a 3.25" x 5" square into the rear fascia for...
    view full answer...
    Image 1 for Image 2 for
  • 4-Flat Wiring Harness for 2020 Ford Explorer Police Interceptor without Tow Package
    I would be happy to help you find a 4-flat for your 2020 Ford Explorer Police Interceptor that does not require the tow package to connect. I recommend the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector item # 118599. The T-One connector plugs directly into your Ford Explorer's existing wiring without cutting or splicing of wires. The powered ModuLite reduces the strain on your wiring system.
    view full answer...
  • Recommended Trailer Wiring Harness for 2022 Ford Explorer
    Tekonsha makes an excellent product, but the # 118599 harness you'd looked at won't fit Explorer Police Interceptor models. It also has a slightly lower amperage rating than the Curt # C56093, so I'd recommend going with the Curt harness. I've linked to an install video for the # C56093 harness.
    view full answer...
  • Recommended Trailer Wiring For A 2020 Ford Explorer
    When installing a trailer wiring harness on your 2020 Ford Explorer The T-One Vehicle Wiring Harness with 7-Way Trailer Connector # 118272 is not confirmed for your vehicle. Since your vehicle had the harness stripped out I recommend The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118599. The # 118599 plugs into your vehicle's wiring harness, which is located inside your trunk, behind the tail lights on both the driver's side and passenger's side. You will also have...
    view full answer...
  • Trailer Tail Lights and Turn Signals Not Working Properly when Connected to 2014 Ford Taurus
    When some trailer lights are not working and others are not working like they are supposed to it can be an indication of a ground problem. But before looking at the wiring on the trailer you can test the vehicle side to see if it is providing the proper electrical signals to the 4-Way. Using a circuit tester such as # 40376 test the wires going into the converter box from your 2014 Ford Taurus (with the trailer not connected). If you are not getting the correct signals coming into the...
    view full answer...
  • Trailer Lighting Problem Causing Directional Signals on 2011 Ford Taurus to Rapidly Flash
    Needing a heavy duty flasher might be a possibility, but before going that route, do a bit of troubleshooting. Check your ground connections. A poor ground connection can cause any number of problems with trailer lighting. On the converter box, there is a white ground wire with a ring terminal on the end of it. Make sure that this wire is securely attached to clean metal. Also, check the ground connection on the trailer itself. Trace the white wire rearward from the trailer connection....
    view full answer...


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