Just bought a 91 auto the running lights, dash lights and break lights keep blowing fuses. I looked for any loose or bare wires and checked the tail light bulb sockets. Still no luck I am new to these trucks and was wondering if there is something I am missing.

 

The running and dash lights I believe are on a different fuse than the brake lights. I might pull all the exterior bulbs and see if it still blows a fuse than if it does than mayb the dash circuit board could be bad. I would also look closely at the wiring running to the back of the truck.

 

I got it sorted. It ended up being there where 2 pinched wires. Pinched between the spare tire and the frame. Thanks for the help