I looked at wiring info for a 91. Diagram below. Some possible issues, blown fuse-- brake switch-- turn signal/multifunction switch-- wiring circuit. Did you check for voltage and ground at the rear? Do the turn signals work, at the rear?
At the stop lamp switch, pink wire with dark blue tracer is voltage, hot all the time, use voltage tester, if no voltage check fuse. Take connector loose from brake switch, if there is voltage on the proper wire, use a jumper wire between the pink wire with dark blue tracer and white wire with tan tracer, the brake lites should come on, if they do, suspect the brake switch.
Image (Click to make bigger)
SPONSORED LINKS
Sunday, July 31st, 2011 AT 6:07 PM