Washer System Operation
With the ignition switch in the ON or the START position, actuate the windshield washer system by pulling the windshield wiper/washer switch lever toward the driver. When the switch lever is pulled back, battery voltage applies through the wash switch contacts to the front washer pump. The front washer pump permanently grounds at G104 and will operate as long as the wash switch is engaged. In order to initiate wiper operation, battery voltage is also applied to the OFF contacts of the front wiper/washer switch through these components:
- Wash switch contacts
- The Intermittent Controller IC
This action applies voltage to the low side of the front wiper motor. The front wiper motor permanently grounds at G104. The motor will continue to operate in LO as long as the wash switch is engaged.
The front wiper motor pawl and switch will engage as the motor turns, and the contacts will remain closed until the wipers are in the park position. While the pawl and switch contacts are closed, voltage applies to the low side of the front wiper motor through these components:
- The WIP fuse
- The OFF contacts of the front wiper/washer switch
- The front wiper motor pawl and switch contacts
This action allows the wipers to complete at least one sweep after the wash switch has been released.