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Brake Warning Indicator: Description and Operation

DESCRIPTION
The red BRAKE warning lamp is located in the instrument cluster and is used to indicate a low brake fluid condition or that the parking brake is applied. In addition, the brake warning lamp is turned on as a bulb check by the ignition switch when the ignition switch is placed in the crank position.

OPERATION
The red BRAKE warning lamp is supplied 12-volt ignition feed anytime the ignition switch is on. The lamp is then illuminated by completing the ground circuit either through the parking brake warning switch mounted on the parking brake lever, the brake fluid level switch mounting in the master cylinder reservoir, or the ignition switch when in the crank position. The red BRAKE lamp can also be illuminated by the instrument cluster in the case when the ABS CAB detects a fault in the ABS system and cannot illuminate the amber ABS warning lamp.