Resetting brake proportion valve?
Thread Starter
Racer
Joined: Jun 2008
Posts: 269
Likes: 0
Resetting brake proportion valve?
The brake light in my C3 is constantly illuminated. I have replaced the brakes and rebuilt the calipers at all four corners. The master cylinder level looks good in both reservoirs. The brakes function pretty well. I checked the parking brake switch and it is not the culprit. When I pull the wire off the proportion valve, the light goes off. In the not too distant past, the front calipers were leaking badly....so I am sure the brake light would have come on for that issue. But the brakes have now been repaired. Shouldn't the proportion valve switch automatically reset? If not, is there a way to manually reset it?
At this point, what is the most likely cause? Proportion valve or failing master cylinder?
Your advice is appreciated.
Thanks
At this point, what is the most likely cause? Proportion valve or failing master cylinder?
Your advice is appreciated.
Thanks
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
If you have a good solid pedal then the switch may be stuck closed. It should recenter (light off) with a good hard push of the pedal. If that doesn't work, pull the switch out and see if the switch plunger is stuck in the up position. While it's out, give the pedal another hard push. The switch is the white plastic part you see in the picture. Plunger is the silver part sticking out the bottom of the switch.
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
