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Wiring for towing can be a hassle if you have to splice into factory wires. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector skips all that. It plugs inline with existing tail light connections behind the rear bumper, giving you a clean, factory-style hookup without altering any of your vehicle’s original wiring.
This harness uses a powered converter that draws power directly from the vehicle’s 12-volt battery instead of the tail light circuits. That keeps the vehicle wiring from being overloaded while ensuring full, consistent power delivery to your trailer lights. It’s a safer setup that helps prevent blown fuses and dim trailer lights.
Some trailers use LED lights, which can cause problems on non-powered systems due to lower resistance. The Curt C55367 harness handles both LED and incandescent lights with ease thanks to its powered design. It provides stable current for running lights, turn signals, and brake lights so everything functions just as it should when you hit the road.
Once installed, the 4-flat connector gives you the standard trailer lighting functions—running lights, turn signals, and brake lights—all in one easy plug. It’s compatible with most small and mid-size trailers, so you can hook up and go without extra adapters or modifications.
A built-in fuse holder and single-prong grey connector make it easy to tie into the vehicle’s power source under the hood. The ring terminal connects straight to the positive battery post for a solid connection, while the fuse holder protects your system from power surges. It’s a straightforward setup that keeps everything tidy and reliable.
The connector for the harness attaches behind the rear bumper. The included yellow wire with a fuse holder connects under the hood — one end plugs into the power wire connector on the driver side in the engine compartment, the other end connects to the positive battery terminal.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
Zac
8/23/2022
One year later and everything works great. It was easy to insta and held up nicely.
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Frank
2/24/2018
It shortened out and blew fuses in my truck so I had no turn signals and flashers. About a month ago I had to purchase another one and installed it. Easy to install but thought it would last longer.