Caravan AWD V6-201 3.3L (1991)
Brake Warning Indicator: Description and Operation
The brake warning light is designed to light only when either:
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The parking brake is applied with the ignition key turned "ON".
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One of the two service brake systems has failed.
Bulb Check
The instrument panel bulb can be checked each time the ignition switch is turned to the start position or the parking brake is set.
Pressure Differential Warning Light Switch
Purpose
The function of the Pressure Differential Switch is to alert the driver to a malfunction in the brake system.
Operation
The hydraulic brake system is split diagonally. The left front and right rear brakes are part of one system and the right front and left rear are part of
another.
Both systems are routed through, but hydraulically separated by the Pressure Differential Switch.
If hydraulic pressure is lost in one system, the warning light switch will activate a red light on the instrument panel, when the brake pedal is
depressed.
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At this point the brakes require service.
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However, since the brake systems are split diagonally the vehicle will retain 50% of its stopping capability in the event of a failure in either
half.
The warning light switch is the latching type.
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It will automatically recenter itself after the repair is made and the brake pedal Is depressed.
