High Operation (Front Wipers)
WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.
In the High position, the windshield wiper washer switch supplies a ground signal to the windshield wiper switch high signal circuit indicating to the BCM that high speed wipers are requested. Upon this signal, the BCM will ground the WIPER HIGH PCB relay coil via the Front Windshield Wiper High Signal Control circuit. The relay coil will become energized, creating a magnetic field and closing the relay switch. B+ will be applied to the windshield wiper motor high control circuit.