I got ready to tow my trailer, but all of a sudden, my trailer running lights won't come on. The brake lights, and turn signals work, but nothing else. Is there some sort of a fuse or something that could go bad? The running lights on the Pathfinder itself are fine, just not on the trailer harness. I have one of those plug in testers, and it is showing the vehicle harness to be at fault.

Brad

 

I have the same problem with my 05. I replaced the fuses under the steering column, this fixed the turn signals and brake lights but running lights still don't work.. Did you find a answer?