Originally posted by Matt167
I recently put an 10PSI RPV in the brake line coming off the master cyl, going into the brake light valve/ switch due to complications on using a disc/ drum master on a drum/drum system ( front brakes ither didn't work or came on after rears ), and my brake light was on, probably because of this, and it is still on, I know how the switch works, with the preassure needing to be equal otherwise the side with more preassure will overcome the side with less preassure forcing the ramp on the switch prod, closing the circut. How do I center the switch?
what Denny said, but you need to know which wheels the valve has cut off and bleed that end. have some one set in the car, key on, and push the brake paddle down as you bleed it. they should watch the light and when the light goes out don't push the paddle no more and you close the bleeder. if the paddle goes all the way down and the light don't go out, go to the other end and do the same thing. If the person pushing the paddle down don't stop when the light goes out then it will trip to the other wheels. this is on a ford, GM center themselves.