well, i know this mite be a dumb question, but i was wondering. i have a 1985 BMW 528E, my speedometer still isn't working. is there a link between the speed sensors on my brakes and my speedometer? or are these totally seperate things. No anti-lock brakes or anything. just lemme know, if not other things i can check to see if thats why my speedometer isn't working i already looked at the differential, but what do i need to focus on exactally? i see the sensors on the diff. but is there something i need to see if it looks wrong? just lemme know thanks!!