Sporadic Lighting Functions for Trailer Lights on a 2017 Ford Edge

Question:

I installed a curt 56292 harness on my 2017 ford edge. I purchased a harness tester to make sure they work. The tester works on my other vehicle. The lights are not functioning correctly on the new harness. When the headlights are on I do not have a right turn signal. When the headlights are off the right turn signal works. I never seem to have brake lights. The LEDs that light up for the running lights are incorrect.

asked by: Ric

Expert Reply:

For starters, the Curt T-Connector Vehicle Wiring Harness part # C56292 is for a 2017 Ford Edge with the Sport and Titanium package. If you have the SE and SEL package on your 2017 Ford Edge then you will want to use the Curt T-Connector Vehicle Wiring Harness part # C56272.

With that being said an LED trailer connector tester like part # F4CT do not always work with all trailer wiring harnesses so this could be the issue. I would ensure that the circuits are working by testing them with a test light. If the above problem still holds true with a test light then the problem is more than likely the ground. I recommend removing the ground and sanding the surface down and then attaching to a clean bare metal.

expert reply by: Conner L