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after driving my car for a bit today the light on the dash was lit up slightly,,then when ni was working on the motor tonight i noticed that the light was now bright..i'm talkin the brake light on the dash,,pedal feels a little harder than it was yesterday..any ideas,has a new master on it..i know it has low vacuum say 11 in at idle and they are power assist brakes..booster shot now???
 

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The brake light is from a switch in the distribution block. I usually means the front vs. back brakes are at a different pressure when braking. This pressure variance sets the switch. Could be a leak at one of the brakes or the master cylinder leaking internally on one of the circuits.

The light means you need to start looking for the problem.
 
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