Join Date: Mar 2002
Location: Austin, TX, USA
Re: Parking Brake Light won't go out....
The H-block is a differential pressure switch. It has a little spool valve in it that should be centered if the brakes have equal pressure on the front and rear. Sometimes during bleeding the spool valve can be pushed to one end or the other. You can try doing a brake bleed again. While you pump the pedal, apply pressure and have your helper slowly open a bleeder on a front wheel, watch the light to see if it goes out. Holler at your helper to close the bleeder when the light goes out. If this doesn't work, try doing it again with the rear. If that doesn't work you may have a bad differential pressure switch. They are known for getting sludged up and often stick. Hopefully the process I described will get you going again though. Good luck.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI