I put a new brake master cylinder on and bled the brakes (1995 chevy k1500 w/t) but the brake warning light is still on. Is there a trick to getting it reset?
- posted
8 years ago
I put a new brake master cylinder on and bled the brakes (1995 chevy k1500 w/t) but the brake warning light is still on. Is there a trick to getting it reset?
Yes - there is a "balance switch" that needs to be centered. it will be tripped either to the front or the back. you need to try bleeding the front brake with very light pressure, with someone watching the light. As soon as the light goes out you need to shut the bleeder. If that doesn't work, you need to bleed the rears the same way..
You don't need to take my word for it ----from
Still have light on. I noticed that when the brakes are pushed you can see the fluid in the large chamber of master cylinder surging. Front cylinder doesn't. Is that normal? The cover has 2 bellows but they don't fit the front chamber. I looked at the old cover and it was flat all the way across (no bellows). Could wrong cover have been put on new cylinder because it doesn't seem like an airtight seal.
The bellows or lack tereof won't affect the action of the brakes - The bellows is there to keep moisture-laden air from contacting the hygroscopic brake fluid to keep it from absorbing water.
Have you "bench bled" the master? You need to get all the air out of the master before attempting to bleed lines and center the valve.
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