T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
(347 reviews)
Price: $70.95
In Stock
Tekonsha
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T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Part Number: TK99FR
In Stock
$70.95
Retail:$112.03
You Save: 37%
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- All Info
- Reviews (347)
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Tekonsha Custom Fit Vehicle Wiring - TK99FR
- Custom Fit
- Trailer Hitch Wiring
- 4 Flat
- 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 behind the trim panel near the driver's side rear seat belt bracket
- Plug in T-connector
- Includes ModuLite power converter to ensure that your vehicle's wiring matches that of your trailer
- Powered module connects 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: 5 amps per circuit
- Tail lights: 7.5 amps per circuit
- 1-Year limited warranty
Installation
This custom-fit T-One connector plugs into your vehicle's 10-pin tow plug, located on the driver's side behind the trim panel near the rear seat belt bracket/coil. You will have to pull back the side trim panel to access this harness.
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.
ModuLite Powered Tail Light Converter
A ModuLite power module is built into this T-One connector. Because your vehicle runs on a multiplex wiring system, the wiring needs to be converted to be 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.
118827 Tekonsha T-1 T-Connector - 4 Wire - Modu-Lite Converter Included
Installation Details
This Product Fits The Following Vehicles
- 2020 - 2020 Toyota Highlander
- 2021 - 2024 Toyota Highlander excluding XSE
- 2020 - 2024 Toyota Highlander without factory tow package
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
- Wrong item was ordered
- Product did not meet expectations
- Defective
Customer Reviews
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - TK99FR
Average Customer Rating: 4.8 out of 5 stars (347 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: Joe S08/14/2023
Exactly what I needed to activate the trailer light function. Instructions were perfect. Took 10 minutes to complete. Honestly, I was surprised it was so easy.
by: Anthony07/30/2023
It worked as advertised for a regular small trailer. I needed a 5 pin for a boat trailer which adds reverse lights to deactivate hydraulic brakes for backing up. Installed standard 7 pin round truck connector (same as my truck) for consistency-just don’t have electric brake circuit. Found reverse light circuit in rear hatch, which wasn’t ideal-especially after disassembling interior to locate 4 pin connections. Would have been awesome to disassemble just 1 location. Is the reverse circuit in the same location as the 4 pin factory wiring? Help the next guy out if you can. Thx!
by: Ralph08/14/2023
The hitch was perfect. I have never installed a hitch before and the videos show me exactly how to do it. I save $[XX] by doing it my self.
Ralph
8/20/2024
The harness made it very easy to install
by: Thomas07/06/2024
It was fairly easy to install after I found the YouTube video that ETrailer had posted. The instructions that came with the light kit were useless. I struggled with finding the panel I needed to pull out to find the connecting wire, but once I found the YouTube, i finished installation really quickly and everything worked fine.
by: Ryan04/29/2024
2024 Toyota Highlander
CONRIMED FIT for 2024 Grand Highlander without tow package. 30-second installation. First plug is under rear cup holder, second plug is capped under rear bumper (driver’s side corner).
by: Matt 08/09/2024
Great wiring harness easy to install with plenty of video to guide you through the process.
by: William 05/12/2023
Installation was easier than expected. Watch the video and you'll be all set.
William
5/13/2024
Still going strong. No issues, works great. Easy install, plug and play.
by: Rogelio06/20/2024
2021 Toyota Highlander
Works, just perfect, tested and good to go thank you etrailer for such good products.
by: Thomas06/26/2024
The product itself was excellent, was quick and easy to install once I viewed an utube on the install. The directions that came with the product failed to mention the two 10mm bolts that needed to be removed. When the bolts are removed the trim panel can be moved enough to get your hand in to access the 10 pin connector. Unless you have a small child at home to help, the bolts need to be removed,
by: Dane 05/09/2024
2010 Toyota Highlander
This worked just fine and so easy for 2024 Toyota Grand Highlander XLE without tow package from factory. Under the last cupholder in rear driver(just pops off) you put the box end to the 10 pin white connector. The 4pin sets up rear passenger side. There is a white cap that covers where you need to connect the 4 pin. Little hard to get too but once off the part slides right on. Tested with and passed.
by: Anthony M02/05/2024
2023 Toyota Highlander
Toyota confused me! I assumed I had a trailer package installed since the rear connector under the bumper was where it is supposed to be. I was wrong! I purchased the hitch and wiring harness only to discover that my Highlander didn't have the wiring harness located inside the rear panel and my trailer lights wouldn’t work. I can’t fault etrailer.com since I could’ve verified my vehicle with Toyota.
etrailer pro’s:
Excellent videos on installation
Website verifies the correct item for your vehicle
Quality parts
Customer service is available and helpful
etrailer com :
My trailer was slightly bowed upon receipt and was difficult to install
I feel a better way to determine which wiring harness you need should be developed but I understand there are a LOT of vehicles out there.
by: Nathan 08/30/2024
wow, this harness and the wiring already in the vehicle made this a very easy install.
by: Desert Finn05/13/2024
Easy install. Should only take 10-15 minutes unless you knock a trim piece pin loose and it falls inside. Very much just plug and play. Install video made it simple for my Highlander.
by: Stephen 04/15/2024
PROS: Perfect plug & play installation - fairly easy to install using the Etrailer install video..
CONS: very disappointing /annoying - Took 1 month to receive my order ( March 15 to April 15 )
by: Stan 07/05/2024
Easy installation, directions needed to be updated.
by: Matthew 08/06/2024
This was fairly easy to install, and still works perfectly one year later. Excellent product
by: Sherman 04/11/2024
Easy install. Instructions aren't detailed very well, but they let lead you to figure it out. Took me about 15m to install and be 100% done.
by: Ted 06/22/2024
Toyota
Good harness - a bit of interior panel work is required, but you can thank Toyota for that:)
by: D04/15/2024
2023 Toyota Highlander
Great product! Easy installation.
by: Robert 08/14/2024
After a year it is perfect
by: Les 07/16/2022
I’m grateful for a company like etrailer. Although it took longer than expected to get the part, that was out of your control due to supply chain issues created by the current administration. As far as etrailer, you’re my go to place for anything trailer. Easy to locate the part on your website. I especially like the videos you provide to show how to install on particular models and configurations. Will always go to etrailer for my trailer needs.
Les
7/17/2023
Great
by: Gary 02/04/2024
Easy installation after watching the video online. Perfect fit
by: Jason 08/08/2024
Received within a couple days of ordering and installed effortlessly within an hour after receiving them.
by: Peter05/31/2022
2022 Toyota Highlander
I thought I could get away with just the trailer connector, but as I didn’t have the towing option on my 2022 Highlander, I needed this full kit. Just follow the simple instructions, and you should be able to connect everything in about 20 minutes. Great product.
Peter
6/1/2023
Still works! Unlike a Subaru, you need the converter. Then it’s plug and play. Easy install, both hitch and wiring.
by: Hayden07/15/2024
Easy install. Worked great!
25
347
Show More Reviews
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Do you have a question about this Custom Fit Vehicle Wiring?
Info for this part was:
Edited by:
Lindsey S
Expert Research:
Jameson C
Video by:
Joshua S
Video Edited:
Jacob T
Video Edited:
Chris R
Updated by:
Wilson B
Updated by:
Noah M
Updated by:
Carrie F
Written by:
Alexander C
Test Fit:
Shane H
Test Fit:
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Test Fit:
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Installed by:
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Joe S.
8/15/2024
Still working just fine. Perfect fit and easy to do.