K 3500 Truck 4WD V8-5.7L VIN R (1998)
Brake Warning Indicator: Description and Operation
Brake Warning/Indicator Lamp Description
BRAKE LAMP
The brake warning lamp in the instrument cluster warns the driver of the following conditions:
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A loss of hydraulic fluid pressure
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Parking brake operation
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A possible malfunction in the antilock brake system
The brake lamp illuminates when ground is supplied from one of the following switches or valves:
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The combination valve switch
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The parking brake switch
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The brake pressure modulator valve
ANTILOCK LAMP
Models with four wheel antilock brakes use the antilock indicator lamp in the instrument cluster. The lamp informs the driver of antilock system
operation and malfunctions. When a malfunction occurs, the brake pressure modulator valve completes the circuit to the lamp. The lamp may stay on
or turn back off depending on the nature of the malfunction. The brake lamp serves as a backup if a malfunction occurs in this circuit. Refer to
Antilock Lamp.
