Wash Operation

In the wash position windshield wiper/washer switch grounds the control circuit of the windshield washer pump to the BCM. The BCM monitors this voltage input to detect when a wash cycle is requested so it can enable the wipers. The BCM energizes the wiper relay which will operate the windshield wiper motor at low speed.

The windshield washer pump sprays solvent onto the windshield. The windshield wipers operate at low speed for 3-5 wipes and returns to the park position.