Wiper Circuit Operation

When the wash button is pressed momentarily a signal is sent to the Body Control Module (BCM) on circuit V10. The BCM then turns the wipers ON low speed for three consecutive wipes after the button is released.

The BCM turns the wipers ON by providing a ground path for circuit V14. This causes the intermittent wipe relay to switch from its normally grounded position and connect circuit A5 to circuit V5. The A5 circuit is protected by a 30 Ampfuse located in cavity E of the Power Distribution Center (PDC).

The V5 circuit is connected to the HI/LOW Wiper relay LOW speed side. Voltage is passed through the relay to circuit V3 then to the LOW speed side of the wiper motor. Ground for the wiper motor is provided on circuit Z1, and terminates at the left front frame rail.