Trailer Brakes Lights Not Working, All Other Lights Work with 2008 Ford F-150

Question:

I have a 2008 f150xlt the brake light on my trailer dont work but all the others does.all connects are good. Is there a fuse for that

asked by: D

Helpful Expert Reply:

On your 2008 Ford F-150 there are fuses for the tow package turn signal/brake light circuits in locations F36 and 42 in the fuse panel. The truck brake light /CHMSL fuse is in location F02.

If all the other trailer lights are working though then it could be a ground problem. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light.

Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces.

The light grounds should also be attached to clean and corrosion free bare metal surfaces. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt bed, or folding tongue, any of these things can interrupt the ground. Running jumper wires from the light grounds to the main trailer connector ground can help.

expert reply by: Michael H