The headlamp washer system consists of the following components:

Battery voltage is supplied to the headlamp washer relay switched input. The BCM controls the operation of the headlamp washer relay. The headlamps need to be in ON position to allow the headlamp washer operation. At every fourth operation of the windshield washer a headlamp wash cycle is initiated. A headlamp wash cycle consists of a prewash, then a pause, and then a wash operation.