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Running trailer wiring usually means cutting into factory wires, but this harness avoids that. The Curt T-Connector plugs directly inline with the vehicle’s taillight wiring using factory-style connectors. It’s a clean, plug-in setup that keeps the original wiring intact and makes the job quick and simple.
Some vehicles can’t supply enough current through the tail light circuits alone. The built-in powered converter on this harness draws power directly from the vehicle’s battery, delivering consistent voltage to the trailer’s running, turn, and brake lights. That stable power helps prevent dim or flickering lights and protects sensitive vehicle electronics.
The 4-flat plug gives you the basics needed for safe towing—running lights, brake lights, and turn signals. It’s the standard trailer connection for most small and midsize trailers, so you can hook up and go without adapters or extra wiring work.
Once installed, the flat connector can be routed through an existing grommet and mounted near the hitch using a simple bracket. That setup keeps the plug secure and out of sight when not in use while giving your wiring job a neat, professional finish.

Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews

William S.
3/30/2026
I use it for hauling my ebike when I go to the local wildlife management area. It continues to work perfect.

Brooke M.
3/31/2025
It's a win win for you and us when things get done right! So glad to hear this, Eddie! Here for you if anything else ever comes up :)

Everett
6/8/2022
I have a 2021 Prius non-AWD. This did not work because Toyota changed the pin assignments on the center connector. I returned the product for refund.


Casey
7/31/2023
Wiring harness is still working great! Ive now been up and down the east coast with many a trailer. From little utility trailers, to 12 ft U-haul box trailers. Amazing how much a little Toyota Prius can hall. Thanks for a well built product that lasts.

Julio
12/26/2022
Still functions perfectly. No wear or corrosion. When not in use i keep the terminals covered and stowed away under my trunk mat, with the spare tire. I regularly rent unhaul trailers and i always have adequate length of wire to reach the trailer and everything powers what its supposed to.
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Brooke M.
3/31/2025
Thanks for the tip about the bumper cover, William! I'm sure you aren't the only one who would want to start with the hitch and the heads up is nice to any future readers who haven't gotten this far yet. :)