Rear Auxiliary HVAC Control Assembly

The auxiliary mode switch in the rear auxiliary HVAC control assembly allows the rear seat passengers to direct the air flow in the rear of the vehicle between the floor, headliner, or a blend between the two options. Power is provided to the rear auxiliary HVAC control assembly, auxiliary HVAC control processor and the auxiliary mode actuator from the IP fuse block on the ignition 3 voltage circuit.

To activate the rear auxiliary HVAC control assembly, the front auxiliary HVAC control assembly must be placed in the REAR CNTL position. Ignition 3 voltage is sent to the auxiliary HVAC control processor and through a solenoid. When the switch is placed in the REAR CNTL position, the voltage is grounded through the auxiliary blower motor switch control, front auxiliary HVAC control assembly and the ground circuit to allow the rear auxiliary HVAC control assembly to operate the auxiliary mode actuator. Voltage delivered to the rear auxiliary HVAC control assembly on the ignition 3 voltage circuit is sent to a variable resistor. Based on the placement of the mode switch, a varied voltage is sent to the auxiliary mode actuator on the auxiliary mode door control circuit, and auxiliary HVAC control processor. The auxiliary mode actuator moves the mode door to the desired output. Ground for the auxiliary mode actuator, auxiliary HVAC control processor and front auxiliary HVAC control assembly are provided by the ground circuit.