1973 GMC Jimmy Brake Warning Light on Dash On All The Time

1973 GMC JIMMY
89,000 MILES • V8 • 4WD • AUTOMATIC
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AV1ATOR
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  • 1 POST
The Red Brake Warning Light on the Dash is On all the time...The Master Cylinder and Brake Booster have been replaced...The Brakes work OK..I am certain the front brakes are working...not sure about the rear...The owners book says that the light comes on when either the front or rear brakes aren't working. This is a well cared for WAY above average Jimmy that is in excellent condition... What makes that light on the dash come on? And what can I do to make it go off?

Thanks,

J.S. Alsobrook
Nov 11, 2008 at 1:55 PM
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SWILLIAMS
  • CAR REPAIR CONTRIBUTOR
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You need to make sure the brakes are working all the way around. It sounds like you have air in the system and need to re-bleed it. Check for a stuck proportioning valve switch or for a bad wire to it.
Nov 14, 2008 at 9:10 PM
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