CONTROLS - REAR
TABLE OF CONTENTS
page page
BLOWER MOTOR SWITCH
DESCRIPTION .........................22
OPERATION ...........................22
DIAGNOSIS AND TESTING ................23
REMOVAL .............................23
INSTALLATION .........................23
BLOWER MOTOR RELAY
DESCRIPTION .........................23
OPERATION ...........................23
DIAGNOSIS AND TESTING ................24
REMOVAL .............................24
INSTALLATION .........................24
CONTROL MODULE
DESCRIPTION .........................24
OPERATION ...........................24
DIAGNOSIS AND TESTING ................24
REMOVAL .............................24
INSTALLATION .........................25
EVAPORATOR TEMPERATURE SENSOR
DESCRIPTION .........................25
OPERATION ...........................26
DIAGNOSIS AND TESTING ................26
REMOVAL .............................26
INSTALLATION .........................26
SOLENOID VALVE
DESCRIPTION .........................27
OPERATION ...........................27
DIAGNOSIS AND TESTING ................27
REMOVAL .............................27
INSTALLATION .........................28
TEMPERATURE CONTROL
DESCRIPTION .........................29
OPERATION ...........................29
DIAGNOSIS AND TESTING ................29
REMOVAL .............................29
INSTALLATION .........................29
TEMPERATURE SENSOR
DESCRIPTION .........................30
OPERATION ...........................30
DIAGNOSIS AND TESTING ................30
REMOVAL .............................30
INSTALLATION .........................30
BLOWER MOTOR SWITCH
DESCRIPTION
The optional rear A/C unit blower motor is con-
trolled by a three position rocker switch (Fig. 1),
mounted in the switch panel on the instrument
panel. The switch allows the selection of one of two
blower motor speeds and an Off position only when
the A/C switch on the front A/C-heater control is acti-
vated.
OPERATION
With the front A/C switch activated, the rear
blower motor speed can be selected by pressing the
rocker switch upwards (high speed) or downwards
(low speed). To turn the rear blower motor off, switch
the blower motor switch to the center position.
Depending on the blower motor switch position, a
blower motor speed command signal is sent to one of
the two blower motor relays. When activated, relay 1
sends power through an integral resistor within the
rear A/C control module and then to the blower
motor, while relay 2 when activated, sends power
directly to the blower motor.
The rear blower motor switch cannot be repaired
and, if faulty or damaged, it must be replaced.
Fig. 1 Rear Air Conditioning Switch
24 - 22 CONTROLS - REAR VA
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