Brake dash warning light
Team Owner
Joined: Sep 2003
Posts: 25,393
Likes: 2,741
I understand the "SHOULD BE" for sure.
Last edited by WVZR-1; Apr 13, 2016 at 05:51 PM.
Team Owner
Joined: Sep 2003
Posts: 25,393
Likes: 2,741
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Intermediate
Joined: Jul 2013
Posts: 44
Likes: 0
Got a vacuum pump bleeder from Harbor Freight and bled all wheels again. Got a better pedal of brakes but the light is still on. One possible problem I did see was that the right front when bled took a long time to get fluid to flowing. The rest of the wheels filled up the pump container with fluid rather quickly with the vacuum pump pressure declining slowly. The RF pump pressure went down quickly with very little fluid flow. I have never had any problems with the brakes pulling either way but this fluid flow is confusing.
Also are there any other bleeder besides the 4 wheels?
Also are there any other bleeder besides the 4 wheels?
Thread Starter
Intermediate
Joined: Jul 2013
Posts: 44
Likes: 0
Thread Starter
Intermediate
Joined: Jul 2013
Posts: 44
Likes: 0
One thing new I did see. I have all 4 wheels off the car - makes for easier bleeding. I cranked the car and put it in drive. The front wheels locked down but the rear wheel will not lock down unless you really stand on the brakes.
Evidently I have unequal pressure between the front and the back but what is causing it? MC has been bled twice. All wheels have been bled at least 5 times.
Could it be the proportioning value in the MC causing the problem? If so how would you check it?
This is a new Cardone Select MC from Rock Auto.
Thread Starter
Intermediate
Joined: Jul 2013
Posts: 44
Likes: 0
Team Owner
Joined: Sep 2003
Posts: 20,179
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
The switch needs to be removed and once removed you can access the pressure equalization piston. This small piston needs to be centered in the master cylinder housing. Bleeding moves the bias switch forward or back. Move this small piston to the center and reinstall switch. The warning light will go out.
Pull the switch and look into the hole. The shuttle piston has a ring groove that should be centered. The switch has a small pin that rests in this groove. If the shuttle moves from a drop of pressure on one side the shuttle pushes up on the switch. If the o-rings on this shuttle leak. Fluid comes out of the switch.
Team Owner
Joined: Sep 2003
Posts: 20,179
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Thread Starter
Intermediate
Joined: Jul 2013
Posts: 44
Likes: 0
BINGO!
Pull the switch and look into the hole. The shuttle piston has a ring groove that should be centered. The switch has a small pin that rests in this groove. If the shuttle moves from a drop of pressure on one side the shuttle pushes up on the switch. If the o-rings on this shuttle leak. Fluid comes out of the switch.
Pull the switch and look into the hole. The shuttle piston has a ring groove that should be centered. The switch has a small pin that rests in this groove. If the shuttle moves from a drop of pressure on one side the shuttle pushes up on the switch. If the o-rings on this shuttle leak. Fluid comes out of the switch.
Another MC??