tolstoy67
05-15-2008, 04:03 PM
hello everybody, new here, hope im posting in the right section. my new to me M3 has the obc and i was wondering from a technical standpoint, what is the signal that the computer is using to determine when a bulb for instance has failed. is it a sourcing or sinking or something totally different. also does anybody know the logic used to determine these faults. and why it sometimes is wrong about a bulb? thanks