Occasionally if you slam the drivers door the brake lights come on. The wiring and connector to the brake light switch are good, it seems that either the pedal, rod, or switch slightly binds and engages the switch. Does anyone have a picture or diagram for a manual brake, auto trans pedal assembly? I am thinking the bushings may need to be replaced, but I don't know how many there are, where they are located, and how it is disassembled.
Take a look at this thread - long read but there are some diagrams midway through. There is 1 bushing around the big pin that the master cylinder rod goes on. The switches themselves have a spring that can get weak over time. http://mmb.maverick.to/threads/master-cylinder-question-may-convert.115761/
FYI - There are 3 bushings for the brake light switch, 2 are basically washers and 1 is a bushing. In my case there was 1 washer so the setup was missing the busing and other washer. Got them in and works great, it even took some of the play out of the brake pedal.