High Blower Speed
WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
When the High blower speed is selected, battery voltage is applied to the blower motor through the heater relay supply voltage circuit. The blower motor resistor is removed from the circuit and the blower switch assembly provides a path to G200 for the blower motor.