QX56 V8-5.6L (VK56DE) (2004)
Blower Motor: Description and Operation
Rear Blower Motor
REAR BLOWER MOTOR CIRCUIT
SYSTEM DESCRIPTION
Component Parts
Rear blower speed control system components are:
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Front air control
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Rear fan switch (front)
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Rear fan switch (rear)
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Rear blower motor resistor
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Rear blower motor
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Rear blower motor relay
System Operation
NOTE: The rear heat or A/C cannot operate unless the front heat or A/C is on.
Rear Blower Control
When the rear fan switch (front) is in the off (O) position, the rear blower motor cannot operate.
When the rear fan switch (front) is in the rear (R) position, it allows the rear fan switch (rear) to control the rear blower motor speed. In any other
position (1-4), the rear fan switch (front) controls the rear blower motor speed regardless of the rear fan switch (rear) position.