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Running trailer wiring usually means splicing into factory wiring, but not with this harness. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs directly behind the tail lights using OEM-style connectors. No cutting, soldering, or guessing—just plug it in and it’s ready to power your trailer lights.
When you’re towing a trailer loaded with multiple running or marker lights, you need wiring that can keep up. The Curt T-Connector part # C55451 can handle 1 more amp per circuit than comparable options, giving you a stronger margin for heavier light loads. That extra capacity helps prevent overloads and keeps your trailer lights working reliably mile after mile.
If you ever move up to a trailer with electric brakes, this harness is ready to grow with you. Use the Curt T-Connector # C55451 as the 4-way foundation, and pair it with an ETBC7 kit to step up to a full 7-way setup. That lets you add a brake controller and other circuits without redoing the original wiring.
If a light stops working down the road, checking this harness is simple. The built-in converter box lets you test input and output voltage separately so you can tell right away whether the issue is on the vehicle side or the trailer side. It’s a straightforward setup that makes electrical diagnosis less of a headache when you just want to get back on the road.
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
Lisa S.
7/3/2018
Great! No issues!!
Jesse E.
3/18/2021
No problems
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Benjamin
3/19/2019
The trailer hitch and all accessories are still working great, I havent had any issues.