Dash Brake light stays on
Thread Starter
Cruising
Joined: Apr 2014
Posts: 10
Likes: 0
Dash Brake light stays on
'80 L48/4spd
Just changed the front brake lines and flushed plenty of new fluid through. No more bubbles. Fluid is full, pedal feels fine, brakes work fine.
BUT dash BRAKE light stays on.
Any idea where to start and what to check?
Just changed the front brake lines and flushed plenty of new fluid through. No more bubbles. Fluid is full, pedal feels fine, brakes work fine.
BUT dash BRAKE light stays on.
Any idea where to start and what to check?
Team Owner
Joined: May 2002
Posts: 24,459
Likes: 13
From: Phoenix
St. Jude Donor '03-'04-'05-'09
You mean the emergency brake light? Not sure what changed doing a brake job, but that light is activated by a switch under the e-brake handle, inside the console.
Easy to access
Easy to access
Pro
Joined: Feb 2014
Posts: 692
Likes: 2
From: Seguin TX
If it isn't the E brake light then I am not sure if a 1980 has the brake warning sensor made into the front distribution block like the older C3's or not but they are very sensitive to air bubbles. You may try to lightly tap on the distribution block right below the master cylinder with a hard plastic hammer and the master cylinder cap off. You might also try pumping the brakes briskly / pushing hard and fast to get the bubble to move.
Melting Slicks
Joined: Apr 2002
Posts: 2,337
Likes: 14
From: Norfolk VA
You can also try driving the vehicle at about 35 mph and slam on the brake pedal. Light should go off.
Le Mans Master
Joined: Aug 2010
Posts: 5,339
Likes: 546
From: Central Texas
The piston in your proportioning valve is not centered. Purchase this tool, follow the directions and bleed your brakes again. No more light glaring in your eyes. 
http://www.performanceonline.com/Com...ve-Bleed-Tool/
http://www.performanceonline.com/Com...ve-Bleed-Tool/
Drifting
Joined: Apr 2008
Posts: 1,305
Likes: 2
From: Lewisburg WV
thegazman
The piston in your proportioning valve is not centered. Purchase this tool, follow the directions and bleed your brakes again. No more light glaring in your eyes.
http://www.performanceonline.com/Com...ve-Bleed-Tool/
http://www.performanceonline.com/Com...ve-Bleed-Tool/
I just went through the same thing with my "79". The problem I had was the piston in my distribution/proportioning valve was stuck. I installed a new valve and bought this centering tool to use while I bled the brakes. Everything good now.
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Le Mans Master
Joined: Aug 2010
Posts: 5,339
Likes: 546
From: Central Texas
In my circumstances I simply had to pump the pedal until the light went off. I figured that the valve was centered when the light wasn't lit. You may have to crack open a bleeder valve and slowly push the pedal down until the light goes off. Then you can insert the tool and proceed with your brake bleeding. I hope that helps some. The brakes systems on these cars are a pain in the a$$.