Isuzu 2000 Trooper Workshop Manual page 39

1A–10 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Fan Control Lever (Fan Switch) Diagnosis
Current flows to the blower motor through the heater and
the A/C relay (B-36) to activate the rotation of the blower
motor by turning "ON" the fan control knob (fan switch).
Blower motor speed is controlled in stages by the resistor,
by operating the switch from "LOW" to "HIGH".
Condition
Blower motor does not run.
Blower motor does not run in certain
position (s).
Blower motor does not stop at "OFF"
position.
For the inspection of the relays, switches and units in
each table, refer to "INDIVIDUAL INSPECTION" in this
section.
Possible cause
—
—
—
Correction
Refer to Chart A
Refer to Chart B, C, D and E
Refer to Chart F
D01RS004