Rear

Steps 1-8:

Steps 9-16:

CIRCUIT DESCRIPTION
Power is available from the CONSOLE fuse through the switch to the blower motor and ground. A series of three resistors contained in a module vary the circuit amperage that controls the blower speed. The heater and A/C programmer receives a feedback voltage signal, but this has no effect on the rear blower operation.

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
2. If CKT 52, CKT 850, and the HI position have continuity, then the measurement will be nearly zero. As slower speeds are selected, the ground path of the blower motor passes through more resistors in the module. More resistors in the ground path increases the voltage at S345. Turn off the rear blower switch in order to measure the voltage.
5. If a resistor in the module is open, all of the cavities beyond that resistor will also be open. If cavity E operates the blower, then the fault is in the switch or in the wiring to the switch.