HVAC System - Manual

Blower Switch

The blower switch provides a choice of LOW, MEDIUM, and HIGH blower speeds. The blower switch receives power from the fuse block when the ignition switch is in the ON position. If the LOW-speed position is selected, the circuit continues through the heater wiring harness to 2 resistors in the resistor assembly near the blower motor.

If the MEDIUM-speed position is selected, the circuit continues through the heater wiring harness to the resistor assembly, but the circuit bypasses one of the two resistors.

If the HIGH-speed position is selected, the circuit continues through the heater wiring harness to the resistor assembly. However, both resistors are bypassed to provide full power to the blower motor. From the resistor assembly, the circuit continues to the blower motor terminal where circuit is completed to ground by a wire in the heater wiring harness. This wire connects to a terminal at the cowl panel sheet metal near the blower assembly in the engine compartment.