ncridgerunner

I can assure you I felt plenty dumb after wasting all that time over a blown fuse. Live and learn! The only positive is maybe my mistake can save others some hassle.

My tail lights on my trailer quit working. Brake and signal lights worked fine. All lights on my truck worked fine. Being old school I immediately began looking for problems with the trailer lights and specifically for a ground problem. After spending 1 3/4 hours with my volt meter checking continuity and checking for worn spots in the wiring insulation i realized the problem was not with my trailer lights. After checking the fuse diagram I found that there are fuses that are specific to trailer lights. (GM calls the tail lights "running lights") Took less than 5 minutes to locate and replace a blown fuse. I'm sure there are several threads that point to this situation but I didn't find a thread specifically relating to this problem. So if you have partial trailer light failure save time and trouble by checking the fuses first.