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Wiring a trailer can be a hassle if you have to cut into factory wires. The Curt T-Connector plugs directly into existing vehicle connectors, so you don’t have to splice or modify anything. It’s a clean, direct connection that keeps the vehicle wiring intact and gets you towing faster.
This harness gives you a standard 4-flat trailer connector for running lights, turn signals, and brake lights. Once it’s plugged in, you’ve got the essential trailer lighting functions ready to go. It’s built for simple, reliable towing setup every time you hitch up.
The hidden plug-in design tucks away neatly behind panels or trim, leaving no loose wires showing. It keeps the install clean and factory-looking while protecting the connections from moisture and dirt.
If your vehicle didn’t come with a factory tow package, this harness has you covered. The integrated converter adapts the vehicle’s wiring for trailer use, so you still get proper signal operation without any added modules or complicated rewiring.

Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
My trailer wiring harness was correct and it also arrived earlier than expected.
The wiring was pretty straight forward and supplied everything you need to get the job done.
Worked perfectly!
I was able to easily assemble the wire harness no problem..excellent quality
Plenty of wire length for a no stress f it.
An easy enough install, but there is nowhere to store the cables, except to use the loop-cover to attach the wires to the loop on the side of the hitch. Within 5 months of ownership, two of the wires were severed, having never been used. After 9 months, the remaining two wires also broke off, and I lost the connector without ever getting a chance to use the product. A real shame, and recommend some kind of hear-resistant cover on the exposed wires by the hitch.
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Jenny N.
11/28/2023
It is a shame that the 4 flat connector broke off. I do have a few fixes that I can recommend if the harness is still installed. You can replace the connector using part # HM48190 which will also give you LED test lights to show that the harness is working. Then to keep the harness in place using a bracket like part # C58001 will keep the 4 flat next to the hitch.