Rear Wiper and Washer System

When continuous rear wiper operation is required, the Body Control Module (BCM) will provide ignition ON voltage to the rear wiper motor. When the wiper switch is turned OFF, the BCM provides circuit ground to operate the motor until the wipe cycle is complete and the wiper arm returns to the base of the rear window.

When intermittent rear wiper mode is selected, the wiper motor will cycle every 7 seconds. The intermittent delay time is also adjusted based upon vehicle speed. With the vehicle traveling greater at 50 mph, the cycle changes to every 5 seconds.

The rear window wiper system operates in several modes:
- Continuous wipe
- Intermittent wipe
- Wash
- Wipe after wash
The windshield wiper circuits are continuously monitored and controlled by the Body Control Module (BCM). If a problem occurs in the electronic components, wiring, switch (except integral motor park switch) and wiper motor a Diagnostic Trouble Code (DTC) will be stored in the BCM memory. The DTC(s) can be retrieved using a scan tool (DRB).