Blower Speed Control

The blower switch provides a choice of four blower speeds and the OFF position. The blower switch receives power through the HTR-A/C FUSE when the ignition is in the ON position. In the LO position, the circuit continues through the heater wiring harness to the two resistors in the resistor assembly near the blower motor.

When the blower switch is in a medium-speed position, the circuit continues through the heater wiring harness to the resistor assembly, but the circuit bypasses one of the two resistors. When the blower switch is in the HIGH position, the circuit continues through the heater wiring harness to the resistor assembly. The circuit bypasses both resistors in order to provide full power to the blower motor.

From the resistor assembly, the circuit moves to the blower motor terminal in order to operate the blower motor. A sheet metal ground wire that connects to a ground terminal on the cowl completes the blower motor circuit to the ground.