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Wiring a trailer doesn’t have to mean chasing down factory wires. The Curt T-Connector plugs in line with the vehicle’s tail light connectors, so you don’t have to splice or modify anything. It’s a clean, straightforward way to get a 4-flat connection for your trailer lights without altering the vehicle wiring.
The harness includes a powered converter that draws power directly from the vehicle battery through a fused black wire. That means the trailer lights run off their own dedicated circuit, protecting the vehicle’s sensitive electronics from overload. The converter only takes signal input from the tail light circuits but provides its own power to illuminate the trailer lights safely and reliably.
Once installed, the 4-flat connector delivers all basic trailer light functions—running lights, turn signals, and brake lights. It’s the standard setup used on most small and mid-size trailers, letting you connect and tow right away without any adapters or extra wiring work.
For vehicles that didn’t come prewired for towing, this kit fills in the gap. The plug-in connectors, powered converter, and included fuse holder give you everything needed to create a proper trailer wiring circuit from scratch. It’s purpose-built for vehicles without a tow package, making it a dependable option for adding trailer lighting capability from the ground up.

Customer Satisfaction Score:
92% were satisfied with this product
8% of customers were not satisfied
Ratings & Reviews

Eugene C.
10/6/2021
Installed at U Haul rental company .Works great. Great product

Brooke M.
10/6/2021
Thankyou for bringing this to our attention. Our customer service team should be reaching out to you in the near future.
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Guitarbilly
8/9/2026
It is still working properly! Definitely recommend!