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89 CHEVROLET 'K' PICKUP BRAKE LIGHT ON DASH STAYS ON WHEN MO…

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89 CHEVROLET 'K' PICKUP BRAKE...
89 CHEVROLET 'K' PICKUP BRAKE LIGHT ON DASH STAYS ON WHEN MOTOR IS RUNNING.BRIGHTNESS DOES NOT CHANGE IF HAND BRAKE IS APPLIED.TIRE SIZE IS WITHIN FACTORY SPECTS .BRAKE PADS & MASTER CYLINDER REPLACED ABOUT 10-15,000 MILES AGO. 380,500 MILES ON TRUCK.
Submitted: 3 years ago.Category: Chevy
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Answered in 1 hour by:
6/8/2015
Chevy Mechanic: Gary, ASE Certified Technician replied 3 years ago
Gary
Gary, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1,987
Experience: Senior Technician
Verified
Hi there,
The brake warning lamp is normally activated by the parking brake switch or the low fluid level switch in the master cylinder.
Disconnect the master cylinder fluid switch, start the vehicle, release the handbrake, does light go off now?
Gary
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