If your car's brake lights stay on even when the engine is off, the brake light switch -- a small, innocuous electrical part you'd only see once something goes wrong with it -- is likely the culprit.

A few issues back, we upgraded a Tri-Five Chevy to a complete coilover suspension from Heidts, with big Wilwood brakes. Everything went on without a hitch, but when we were all done the brake pedal ...