Rear A/C-Heater

In the RUN position, the ignition switch connects circuit A2 from fuse 2 in the Power Distribution Center (PDC) to circuit A22. Circuit A22 powers a bus bar in the fuse block that supplies voltage to circuit C1 through fuse 7.

Circuit C1 supplies battery voltage to the A/C- Heater switch and splices to the coil side of the rear A/C-Heater relay Circuit Z1 provides ground for the coil side of the relay The rear A/C-Heater relay supplies battery voltage to the rear A/C-Heater blower motor through the rear blower motor switch.

When the operator turns the rear blower motor switch to either the LOW, MEDIUM or HIGH positions, ground is supplied to contact side of the relay through the resistor block and blower motor. Circuit F32 from fuse 15 in the fuse block supplies battery voltage to the contact side of the rear A/C-Heater relay

The rear blower motor switch connects to the blower motor resistor block. The resistor block contains two resistors in series that connect to the case grounded blower motor.

When the rear blower motor switch is in the LOW position, it supplies voltage to the resistor block on circuit C50. From circuit C50, voltage passes through both resistors in the resistor block to the blower motor.

In the MEDIUM position, the rear blower motor switch supplies voltage to the resistor block on circuit C60. From circuit C60 voltage flows through one resistor to the blower motor.

In the HIGH position, the blower motor switch connects directly to the blower motor on circuit C70. Voltage does not pass through the resistors.