No Trailer Lights After Installing Curt Wiring Harness on 2011 Toyota Venza

Published 03/14/2020

Question:

Installed wiring kit C56079, couldnt be easier. Fuse is installed and still good Flat plug has power to all three pins using a test light grounded to the exhaust. Plug it in to my small trailer and get nothing. Plug the trailer into another source and it works fine. Trailer lights are two small round 3inch cans with 1157 bulbs. WHATS WRONG?

asked by: James R

Expert Reply:

I'm guessing where you grounded the Curt # C56079 isn't sufficient. It could be grounded well enough to light up your test light, especially if it's an LED tester, but not enough for the actual trailer lights. I'd start by moving the ground location to something more secure than the exhaust like the vehicle frame. Making sure the location is clean and bare metal as well.

expert reply by: Charles S