GM Service Manual Online
For 1990-2009 cars only

Headlamp Washer System Components

The headlamp washer system consists of the following components:

    • Headlamp washer module
    • Headlamp washer fluid level switch
    • Headlamp washer pump
    • HDLP WASH 30A circuit breaker

Headlamp Washer System Controls

The headlamp washer system is controlled by the following components:

    • Headlamp washer module
    • Dash integration module
    • Headlamp washer fluid level switch
    • Windshield washer fluid level switch
    • Windshield wiper washer switch

Headlamp Washer System Operation

The headlamp washer pump is controlled by the headlamp washer module, which is attached to the wiring harness behind the right headlamp assembly. Battery positive voltage is supplied to the module and is used to power the headlamp washer pump when the relay coil within the washer module is energized. The dash integration module controls the low side of the relay coil and the headlamps must be on for the relay to be energized. The windshield washer pump control circuit is spliced to the headlamp washer module and is used as a washer switch signal circuit. The headlamp washer fluid level switch and the windshield washer fluid level switch provide a signal circuit to the headlamp washer module and do not allow the relay to be energized when the fluid level in either of the washer fluid reservoirs is low.