Chevrolet Repair: Brake diferentail pressure switch, brake cylinder, pressure switch

Question
I replaced the rear wheel brake cylinder on my '95 Astro. After bleeding the new cylinders, the "break" light on the dash is lit. When I disconnect the differential brake pressure switch, the light goes out. How do you center the differential brake pressure switch? I have tried without success.

Thanks

Gordy  

Answer
The light will usually go out after you have driven the vehicle for several miles and are ABSOLUTELY POSITIVE that you have ALL the air out of the brake system.

The valve will automaticallt self-center itself while driving and using the brakes.


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