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Wiring a trailer usually means tracking down wires and making splices, but this Curt harness skips all that. The T-Connector plugs directly into the vehicle’s existing tail light wiring to give you a 4-pole flat trailer connector. There’s no need for a factory tow package—just plug it in and it’s ready for use.
Towing often means exposure to rain, puddles, and road spray. This harness is built to handle normal wet conditions without issue, keeping your trailer lights working dependably. It’s not made for submersion, but stays dry and protected in everyday use thanks to the weather-resistant 4-flat connector.
Once installed, the 4-pole connector gives you the standard lighting functions—running lights, turn signals, and brake lights—so your trailer stays visible and legal on the road. It’s a simple way to add all the essentials in one clean hookup.
Some harnesses need a separate ring terminal ground, but this one doesn’t. It’s designed to ground through the factory connection points, so there’s no extra wire to route or attach to the frame. That keeps installation cleaner and faster from start to finish.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
Towne G.
8/22/2023
The wiring harness has held up well. Works great. No issues.
Jeff
3/31/2025
Still functioning flawlessly over a year after installation. Will use etrailer products on my next vehicle.
Broderick
10/2/2024
The harness has been working flawlessly and had extra wire incase I need to extend it or something of that nature. I have a 1996 ford ranger and it works great to tow my aluminum boat and trailer.
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Douglas
3/4/2026
Great so far! No issues at all.