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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1430 (Wiper System & Washer System) >> Diagnostic Information and Procedures >> DTC B3810 or B3811: Washer Relay Circuit >> Circuit Description

Circuit Description

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Battery positive voltage is supplied to the coil and switch sides of the rear washer and headlamp washer relays. The body control module (BCM) energizes a relay by grounding the relay coil through the relay control circuit. When a relay is energized the relay switch is closed and battery positive voltage is supplied to the washer pump control circuit.

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