Lo Operation

When the Ignition Switch is in the RUN position, voltage is applied through RR HVAC FUSE to the coil (power side) of the Low Blower Relay. When the Rear Auxiliary Heater Control Switch is turned to the "LO" position, ground is supplied from G200 through the closed contacts of the Rear Auxiliary Heater Control Switch to the coil (ground side) of the Low Blower Relay. With both power and ground applied to the coil of the Low Blower Relay, it energizes and its contacts close. Voltage is applied through the MAXI FUSE and the closed contacts of the Low Blower Relay to the Blower Resistor. Voltage is applied across both of the resistors in the Blower Resistor, thus lowering the voltage potential at the Rear Blower Motor. Since the Rear Blower Motor is grounded at G400, it will operate at approximately one third of full speed operation.