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Wiring a trailer can be tricky, but this Curt T-Connector harness keeps things clean and simple. It plugs directly into the vehicle’s factory wiring, so there’s no need to cut or splice wires. The connectors match the factory plugs, giving you a solid, weatherproof fit that’s ready to go right out of the box.
With the built-in powered converter and 4-pole flat trailer connector, the Curt T-Connector #C56309 lets your trailer’s brake lights and turn signals flash in perfect sync with the vehicle lights. It provides a consistent signal for running lights, turn signals, and brake lights so your trailer lighting always matches what your vehicle is doing.
This harness is designed for vehicles that don’t have a factory tow package. Everything you need is built into the kit, so you can add trailer lighting capability without extra wiring or accessories. It’s straightforward enough for most DIYers to handle in an afternoon.
Once installed, the wiring stays tucked out of sight for a factory-style finish. The hidden plug-in design keeps things neat while protecting connectors from road debris and moisture. That means less hassle over time and a setup that looks like it came straight from the factory.

Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews

Pklch
9/4/2025
Perfectly

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D. H.
6/23/2025
I have not had any issues with the harness after a year of use. I keep dielectric grease on the end have had no issues.