T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
(94 reviews)
Price: $87.62
In Stock
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Item # 118646
Retail:$136.50
Our Price: $87.62
You Save: 36%
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- All Info
- Reviews (94)
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Tekonsha Custom Fit Vehicle Wiring - 118646
- 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 rear cargo area
- Plug in T-connector
- Run hot lead to car battery
- 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: 4.2 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 wiring harness, which is located in your rear cargo area on both the driver's side and the passenger's side. You will need to remove the threshold, floor panels, cargo trays, and interior trim panels to access the harness. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery and insert the provided fuse.
Once installation is complete, the 4-way flat connector will be stowed in your rear cargo area.
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.
118646 Tow Ready T-1 T-Connector - 4 Wire - Modu-Lite
Installation Details
This Product Fits The Following Vehicles
- 2020 - 2021 Volkswagen Golf excluding GTI
- 2015 - 2019 Volkswagen Golf excluding GTI and R models
- 2015 - 2019 Volkswagen Golf excluding GTI and R models
- 2020 - 2021 Volkswagen Golf excluding GTI models
- 2012 - 2015 Volkswagen Passat
- 2014 - 2015 Volkswagen Passat 1.8L I4 Engine - Turbocharged
- 2012 - 2015 Volkswagen Passat 2.0L I4 Diesel Engine - Turbocharged and 3.6L VR6 models
- 2012 - 2014 Volkswagen Passat 2.5L I5 Engine
California residents: click here
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
- Wrong item was ordered
- Product did not meet expectations
- etrailer mistake
Customer Reviews
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118646
Average Customer Rating: 4.9 out of 5 stars (94 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: Jesse07/15/2023
2013 Volkswagen Passat
The Tekonsha was an easy install on a 2013 Passat. The hardest part of the install is removing interior trim to hide power wire. Works as designed.
by: C.09/24/2022
Works as advertised, snaps right into existing wiring. Removing interior panels of vehicle to expose existing wiring maybe the only challenge depending on your vehicle. VW e-Golf installation was pretty straight forward.
by: Kevin07/25/2021
Oregon to Colorado in 22 hrs non stop without a single hiccup. Everything worked great
by: Gary R.07/09/2017
2017 Volkswagen Golf
I installed this harness on my 2017 Golf GTI. All tee connections fit the OEM sockets perfectly. The location I chose to mount the module required me to extend the left socket wiring (yellow wire). No big deal. There is a rubber body plug on the floorpan on the drivers side rear corner that can be used to exit the 12 volt battery wire from the rear compartment. I ran the battery wire externally underneath the chassis attaching to the brake lines using zip ties. I removed the underbody splash shield on the drivers side to access the brake lines and then reinstalled afterwards. Removing and installing the rear trim panels to gain access to run the module wires from left to right took the most time. I am very detailed oriented and I spent what time was necessary to end up with a superb installation.
by: Patrick06/18/2021
The 118646 kit worked great! I called in because I was confused regarding the application listed on the box (Golf) and my car which is a Passat. The young lady on the phone was extremely helpful. When I got the confirmation, there were two videos that showed me EXACTLY how to install it. The video was clear and professional. Although I didn't enjoy crawling under the car, I was able to successfully install the kit and it even works. Thanks for your extra help.
Patrick
6/19/2022
Works great! No issues.
by: Jim 02/04/2023
2015 Volkswagen Passat
I installed the harness on my 2015 Passat TDI. The instructions were very clear to understand and the video was very helpful.The harness is working as designed.
Thanks!
by: Edward Brandt04/18/2020
Great product. Super happy with it. No issues. Also, when I called you guys for help, you were very helpful and friendly. Can’t recommend you enough!
by: Cliff B.03/26/2017
Hitch and wiring are working flawlessly. Best decision I made adding a hitch to my car to carry items that would not fit inside.
Cliff B.
3/26/2018
Everything is still working very well and I am very pleased with my purchase.
by: Doug06/20/2020
It fits and works fine on my 2016 GTI SE. ETrailer is doing their customers a disservice telling them the Tekonsha wiring harness does not fit the MK7 GTI. I had read that several people had used it without issue, and went as far as contacting Tekonsha and speaking to a tech person there. They agreed that circuitry and electronics-wise, there is no difference between this and the other that would require splicing, and it comes down to whether the plugs are correct and are reading the signals on the correct wires. The plugs are an exact fit and it maps the yellow and green signal wires to the correct wires on the car harness, the same ones identified on the recommended splice harness. It would be helpful if ETrailer and Tekonsha could work together to get the application specs for 118646 updated to include the GTI so it could save customers like me time researching this, and the anxiety about buying and using something that supposedly doesn't fit.
by: Denny F08/24/2020
Made the mechanic watch the video on installation before we got started. Hitch and wiring went on effortless..
Denny F.
8/25/2021
Works great,have a small 5x8 trailer for getting our racing kart to the track.
by: Michael 02/06/2023
This is a direct plug and play. The service from Etrailer is also fantastic
by: Sam04/15/2022
Amazing product customer care was on point I spoke with Chelsea and she was amazing. Got everything figured out and everything here quicker than expected. Highly recommend.
by: John Filus05/21/2021
I had purchased the stealth hitch, coil over air bags and wiring harness, all products were top shelf top name and top quality, absolutely no regrets. Customer support and service were real professional and very knowledgeable. I’m still using etrailer for more products, now some of my friends are too.
by: Tony05/05/2020
When i needed to add a trailer hitch to my car for a move, i searched around and this was pretty much the cheapest priced hitch i could find( about a hundred cheaper than uhaul) so i got it and installed myself without taking the bumper off and im very pleased with my purchase. If i ever need to put a hitch on another car i will be coming here first, thanks!!
by: Nick R03/13/2018
2013 Volkswagen Passat
I installed this wiring kit with the help of one other person on my 2013 VW Passat. Connecting everything in the trunk area was extremely simple due to the T-connections. Running the power supply line to the battery took the most time to ensure proper routing, but it was fairly simple. Removing protective plastic shields exposed many lines to zip tie the wire onto and ultimately made the install safe for the long term.
by: Bob M.09/06/2018
2015 Volkswagen Passat
Original wiring harness had a problem and did not power running lights when installed per instructions. etrailer customer service was great to work with and got a replacement product out to me promptly. All my lights are now working. Installation video clearly show how to install product and is a great time saver.
by: Roger B03/24/2017
2015 Volkswagen Golf
Wiring harness and trailer hitch for my VW Golf fit fine, no monkeying around. It took an afternoon to work through the process of installing the parts, but there were no significant snags in getting it done. Reviewing the instructions and available videos before hand were helpful.
by: James07/06/2021
My VW Golf tSI had a non-standard-factory rear harness in it. etrailer went out of their way to provide me with a harness that I could use in place of the one for a "normal" Golf tSI. They also spent some time with me on the phone, to make sure the replacement would work. After a year, it all still works fine!
by: Dallas12/19/2017
Volkswagen Passat
Wiring was fairly easy to install. Directions were easy, this was better than cutting and splicing into factory harness. The passat has a plastic skid plate that comes off and makes for easy wire runs. overall im happy with the hitch and the wiring
by: ANDREW J04/29/2017
2014 Volkswagen Passat
RECEIVED YHE WIRING HARNESS IN PERFECT CONDITION. THE INSTALL WAS FLAWLESS. TOTAL TIME OF INSTALL WAS APPROXIMATELY 35 MINUTES AND I DIDN'T RUSH MYSELF. RUNNING THE POWER LINE FROM THE MODULE TO THE BATTERY WAS A BREEZE, THE HARDEST PART WAS JACKING UP THE ONE SIDE OF THE CAR TO ROUTE THE WINE. PRODUCT WORKS PERFECT AND EVERYTHIG FIT PERFECT. YOU CAN'T GO WRONG BUYING ETRAILER PARTS.
by: Danny c09/23/2017
I had no problems installing the trailer hitch it was like a breath of fresh air.wiring it up was very easy and I must say the connectors was an easy way to connect to the existing wiring.
by: Jamie S04/20/2017
I want to thank my etrailer customer service contact, Ashley E for helping me finish my wiring project.
When I began preparing to install wiring harness when I realized I had ordered the incorrect part number.
I called etrailer Customer service and Ashley promptly reviewed my order and identified the appropriate harness for my vehicle. She generated an order for the correct product and arranged for the return of my incorrect product.
I was surprised and delighted to find that the new product arrived 3 days later.
The correct harness is a custom product that is connected with coupling connector that plugs in between the tail light wires and the light. All I had to do is route the power wire to the battery. It works perfectly!
Thanks Ashley and etrailer for a great experience.
Jamie S
by: Art C12/29/2020
2015 Volkswagen Golf
I have a 2015 Golf Diesel Sportwagon. I tried other wiring harnesses, but they did not work due to some software changes made to diesels by VW. This harness did the job and it has been working perfectly since I installed it (in 2019).
by: Brad 01/03/2022
2017 Volkswagen Golf
Installed in my 2017 Golf R and works great. Install of the hot lead to the battery was the hardest part. I ran the lead under the door trim panels and under the carpet in the footwell. Found a blanked grommet in the firewall to run through to the battery. Sano install once done.
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Do you have a question about this Custom Fit Vehicle Wiring?
Info for this part was:
Expert Research:
Mike L
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Expert Research:
Jeffrey L
Edited by:
Lindsey S
Video Edited:
Jacob T
Video Edited:
Dustin K
Video Edited:
Chris R
Video by:
Kathleen M
Updated by:
Laura H
Updated by:
Wilson B
Updated by:
Isabelle B
Installed by:
Cole B
Written by:
Alexander C
Test Fit:
Shane H
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Gary R.
7/9/2018
After one year everything is working perfectly!