The Blower Speed Control

The blower switch operates in the following 4 blower speeds:
^ LO
^ MED 1
^ MED 2
^ HIGH

The blower switch receives power from the heater and the a/c fuse when the ignition switch is in the ON position.

In the LO speed position, the circuit continues through the heater wiring harness to the 3 resistors in the blower motor resistor relay.

In the MED 1 speed position, the circuit continues through the heater wiring harness to the blower motor resistor relay, but bypasses 1 of the 3 resistors.

In the MED 2 speed position, the circuit continues through the heater wiring harness to the blower motor resistor relay, but bypasses 2 of the 3 resistors.

In the HIGH speed position, the circuit continues through the heater wiring harness to the blower motor resistor relay, but bypasses all 3 resistors and closes the relay's normally open Contact to provide full power to the blower motor from the HVAC MaxiFuse.

From the blower resistor relay, the circuit moves to the blower motor terminal. The blower motor circuit completes to ground by a wire in the heater wiring harness that moves from the blower motor terminal to the generator or the a/c compressor bracket.