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The Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector is built with plug-in connectors that tie directly into the factory tail light wiring. There’s no cutting, splicing, or guessing which wire goes where. Just connect the harness to the existing plugs and you’re ready to power your trailer lights.
Once installed, the 4-flat connector delivers the standard running lights, brake lights, and turn signals your trailer needs. It’s a simple, reliable setup that works for basic towing and keeps everything operating in sync with your vehicle’s lights.
The built-in powered converter handles the electrical load safely when running trailer lights, even with sensitive vehicle wiring or LED systems. It draws power directly from the battery instead of overloading the vehicle circuits, so your lights stay bright and stable every trip.
The harness tucks neatly behind trim panels using existing factory grommets for routing. When finished, only the 4-flat plug sits near the hitch for quick access while everything else stays hidden and protected from the elements.
Customer Satisfaction Score:
65% were satisfied with this product
35% of customers were not satisfied
Ratings & Reviews
Great price, quality product. Already installed.
Haven't recieved it yet
Wire under the car difficult limited attachment points.
Wrong item
Works Great! Fast shipping!
Works great. Installed as easily as they said would. Fast shipping.
Just installed a Curt trailer hitch from etrailer, on a 2013 Nissan Sentra , and it fit like a glove - Thank you to Greg of etrailer for helping with the particulars
I have ordered my trailer needs from etrailer for years! I have never been disappointed and believe I never will. The light harness I ordered and received is excellent!! Thank you etrailer !!
Hitch slider as expected, wiring was a breeze. I opted to keep the main powered wire external rather than muck around with it but plug and play and the lights are spot on, no splicing so I can return it to factory if needed for some reason. Hands down the easiest trailer wire I have installed and customer service that should be used as a benchmark for the digital world.
I have yet to receive the wiring harness so I am unable to rate the wiring harness at this time.
Katrina B.
4/26/2022
I see that you have also received a hitch receiver. We like to keep all of the items in the same box. Can you please check the box holding your hitch to make sure that the wiring harness is not also in there?
Ronald S.
4/26/2022
My mistake, I received the light kit inside the box that the trailer kit came in.
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time.
Victoria H.
11/14/2024
Hi Jeff, this will fit onto your 2021 Nissan Sentra. Please let me know what part you received, so I can make this right for you.