Do you know if one of the fuses was a brake fuse?
After you replaced the fuse did it blow again? If it did you need to look for a short to ground.
Do you have a multimeter? If you don’t already you can get a cheapie one for $20.
I’m assuming your tail lights are a separate bulb?
The first thing to do is check to see if you have somewhere around 12 volts at the bulb socket. Remove the bulb and while someone (or something) depresses the brake pedal, set your multimeter to volts DC and probe between the center terminal (positive) and the outer casing of the housing (negative). Next, probe between the center terminal and a metal part of the bus (chassis ground, negative). If you have a ground wire to the lamp holder, use the continuity function of the multimeter to check for continuity between it and chassis ground.
You may find it helpful to have some long test leads with alligator clips to perform the continuity tests.
Next, do you have 12 volts into that brake switch? Using your multimeter you can check for voltage there, between chassis ground and that connector
|