I recently went camping and just found out that the right turn signal/brake lights do not work at the trailer connector. They do work on the truck. I always figured that if they worked at the truck, then the harness would be fine too, since it is factory installed. Everything else checks out fine. Is there a connection somewhere or a fuse that may be causing my problem. I'd hate to go digging through all that wiring.

DId you check the bulbs on the trailer?

Check the fuse block under the hood. There is a fuse for Trailer lights, believe it or not. I know I spent a day under my snowmobile trailer before I read my manual to find out there is another fuse under the hood.

There was a blown fuse in the fuse panel in the dash. I didn't realize they would be on a seperate fuse than the truck. Thanks for the help.

Glad you found the problem. Are the right & left lights on different fuses?

Glad you found the problem. Are the right & left lights on different fuses?
Jeff, Yes they are. Very nice knowing that if one blows, you still have the rest.