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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1661 (Wiper System & Washer System) >> Diagnostic Information and Procedures >> DTC B3810 or B3811 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Battery positive voltage is supplied to the coil and switch sides of the rear washer and headlamp washer relays. The 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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