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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.
Features:
Specs:
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.
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.
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Average Customer Rating: 4.8 out of 5 stars (76 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.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 - 06/19/2022Amazing 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.
Oregon to Colorado in 22 hrs non stop without a single hiccup. Everything worked great
Installation video was spot on and was very useful!
Made the mechanic watch the video on installation before we got started. Hitch and wiring went on effortless..
Denny F - 08/25/2021Installed 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.
The wiring harness worked as expected. It just takes a little time and patience to install, and it will perform great. I'm happy I bought this.
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.
Plug and play greasy thanks
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!
Great kit, had everything needed for installation. Works well and does not seem to cause any issues with VW systems. Just a bit of a tight fit for the battery connection.
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.
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.
I’m 77 super ez to install yourself and is everything it’s rated to di
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
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.
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.
Gary R - 07/09/2018Very easy to install.
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).
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.
Hitch and electric kit both shipped as promised. Installation was a breeze and looks like a good long lasting product. Thanks Etrailer!
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.
Worked like it should have and came swiftly and well packaged.
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!!
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.
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