Low Washer Fluid Message

WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

The Low Washer Fluid message is controlled by the instrument panel cluster using an input from the windshield washer fluid level switch. The windshield washer fluid level signal circuit is supplied ignition voltage through a resistor then monitored within the instrument cluster. The windshield washer fluid level switch is normally open so the instrument cluster detects ignition voltage on the windshield washer fluid level signal circuit whenever the washer fluid level is not low. When the washer fluid reaches the point where the driver should be informed that the washer fluid is low, the windshield washer fluid level switch closes. When the windshield washer fluid level switch is closed the windshield washer fluid level signal circuit voltage is pulled low, and the instrument panel displays the Low Washer Fluid message on the driver information center. In order to prevent the Low Washer Fluid message from being displayed while sloshing is occurring in the washer fluid container, the instrument cluster is programed with a 1 minute delay before displaying the Low Washer Fluid message during an ignition cycle.