High Speed Operation
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. 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 voltage to both the Wiper and Wiper HI relay coils. This energizes both relays and allows battery voltage from the Wiper relay switched output to the switched input of the Wiper HI relay through its contacts and out the switched output of the wiper HI relay to the high speed circuit of the windshield wiper motor. The windshield wiper motor will operate at high speed.