Brake warning light
Thread Starter
Intermediate
Joined: Jan 2014
Posts: 36
Likes: 0
From: Jacksonville Florida
Brake warning light
Posted earlier that I was having issues with brake warning light on all the time on 1985 vette after I found it disconnected by previous owner. Replaced brake pressure switch (new one) and light was out for a few days then came back on. Checked shuttle in master cylinder behind pressure switch, moved it back and forth, realigned and inserted pressure switch. light stayed off part of the day and then back on. played with shuttle again and as soon as I put pressure on brake peddle light back on. Had Midas check and bleed brakes and still no results. light on and I am stumped. Where is the proportioning valve? Midas said master cylinder working as it should along with brakes.
Safety Car
Joined: Aug 2013
Posts: 4,429
Likes: 605
From: Minneapolis Mn
Valve
Posted earlier that I was having issues with brake warning light on all the time on 1985 vette after I found it disconnected by previous owner. Replaced brake pressure switch (new one) and light was out for a few days then came back on. Checked shuttle in master cylinder behind pressure switch, moved it back and forth, realigned and inserted pressure switch. light stayed off part of the day and then back on. played with shuttle again and as soon as I put pressure on brake peddle light back on. Had Midas check and bleed brakes and still no results. light on and I am stumped. Where is the proportioning valve? Midas said master cylinder working as it should along with brakes.
Melting Slicks
Joined: May 2010
Posts: 2,082
Likes: 3
From: Conowingo Maryland
you have unequal perssure in your system. is your master cyl full? It takes a fair amount of pressure loss to kick the switch. While the switch is centerend i would gravedly bleed the brakes. Chances of air causinng this is slim but you have to start some where. After you bleed the system real good see what you have.
