Mist Operation
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Windshield wiper/washer system MIST operation is identical to LOW operation, except that the MIST switch is a press and release type switch. When the wiper switch is moved to the MIST position and released, low speed wiper motor operation is started and will continue until 1 cycle is complete. If the wiper switch is moved to the MIST position and held, the wiper motor will operate in the LOW mode until the switch is released. In the MIST position, ground is supplied through an internal resistor to the windshield wiper switch low signal circuit to the body control module (BCM). The BCM will energize the WIPER relay that operates the windshield wiper motor at low speed.