Hooked up boat this weekend and noticed trailer brakelights not working. Brakelights on truck were also not working. All other lights working. Have not checked to see if switch is working. Any other suggestions.

 

Blown fuse?

 

Sounds like blown fuses... there is one for the truck lights, two for the trailer brake lights (left and right) and one for the trailer parking lights. My 97 had a short in the OE harness that caused the trailer light fuse to blow. Start there.

Also, if none of them are working, it's possible that the brake light switch isn't working... does the truck work without the trailer plugged in? What about the turn signals... are they working?

-Joe-