Wiper and Washer Systems: Description and Operation

Wipers and Washers

The wiper and washer system consists of the following components:

- Body Control Module (BCM)

- Multifunction switch

- Steering Column Control Module (SCCM)

- Washer pump

- Washer reservoir

- Windshield wiper blades

- Windshield wiper motor

- Windshield wiper mounting arm and pivot shaft

- Windshield wiper pivot arms

- Wiper relay

Wipers

The wiper system is activated by the multifunction switch. The multifunction switch is mounted to the SCCM (Steering Column Control Module). The SCCM (Steering Column Control Module) commands the windshield wiper motor to activate the appropriate low, high and intermittent modes.

Washers

The washer system is activated by the multifunction switch. The multifunction switch is mounted to the SCCM (Steering Column Control Module). The SCCM (Steering Column Control Module) commands the windshield wiper motor to activate the washer pump to direct washer fluid to the windshield.

Courtesy Wipe Feature

When the windshield washer system is activated, the wipers cycle 3 times with washer fluid, followed by one final wipe a few seconds later to clear any remaining fluid that is dripping from the top of the windshield. This feature can be enabled/disabled through the message center. For additional information on enabling/disabling this feature, refer to the Owner's Literature.

Wiper Activated Headlamps (if equipped with automatic headlamps)

If equipped with automatic headlamps, the BCM (Body Control Module) illuminates the exterior lamps within 10 seconds of the windshield wipers being activated by the multifunction switch when the headlamp control switch is in the AUTOLAMP position. The BCM (Body Control Module) continues to illuminate the exterior lamps for approximately 30 seconds after the windshield wipers have been turned off.

Speed Dependent Wipers (if equipped)

The speed dependent feature increases the frequency of wiping to compensate for the extra moisture that accumulates on the windshield as the vehicle speed increases. This feature activates when the multifunction switch is in any intermittent setting except the INT 1 position. As vehicle speed increases, the speed dependent feature gradually shortens the delay between wipes.