The Project Pad

all the bulbs in my third brake light are burned out now and when was trying to get it apart to change them it broke. does anyone here know of a good place to get a new or used third brake light at a reasonable price? i cant find one anywhere and the brake light warning on my dash is annoying.

also is there a way to modify the relay so that it ignores the the third brake light being out? i also read something about using the relay from an audi V8 because it doesnt have the circuit for third brake light check.