Air Distribution - Front Control

When the mode switch is turned, a signal is sent from the HVAC control assembly to the mode actuator through the mode door control circuit.

When a desired mode setting is selected, a variable resistor is used to determine the mode door position signals value. The resistor changes the 12 volt signal coming into the actuator and varies the voltage to move the actuator into the proper position, based on the signal from the HVAC control assembly. Ground is provided to the mode actuator by the ground circuits.

The instrument panel fuse block provides power to the mode actuator through the ignition 3 voltage circuit. Power and ground are provided to the HVAC control assembly by the ignition 3 voltage and ground circuits.