Medium Blower Speeds
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
When the Medium 1 blower speed is selected, battery voltage is applied to the blower motor through the heater relay supply voltage circuit. Voltage is decreased through 2 series resistors to achieve the desired blower speed. The blower motor is grounded through the blower motor resistor assembly and the blower switch at G200.
When the Medium 2 blower speed is selected, battery voltage is applied to the blower motor through the heater relay supply voltage circuit. Voltage is decreased through 1 series resistor to achieve the desired blower speed. The blower motor is grounded through the blower motor resistor assembly and the blower switch at G200.