Ford Transit 2002 Owner's Manual page 1467

System Checks
PINPOINT TEST A : BLOWER MOTOR INOPERATIVE / PARTLY
INOPERATIVE
TEST CONDITIONS
A1: CHECK ALL SPEED SETTINGS OF THE BLOWER MOTOR
A2: CHECK FUSE F64
A3: CHECK THE VOLTAGE AT FUSE F64
A4: CHECK THE VOLTAGE AT HEATER BLOWER MOTOR
DETAILS/RESULTS/ACTIONS
Ignition switch in position II.
1
Switch the blower switch through all speed
2
settings.
Is the blower motor inoperative in all the switch
positions?
Yes
GO to A2.
No
- The blower motor is only inoperative in switch
position 4:GO to A8.
- The blower motor is inoperative in switch positions
1, 2 and/or 3:GO to
Ignition switch in position 0.
1
CHECK fuse F64 (BJB).
2
Is the fuse OK?
Yes
GO to A3.
No
RENEW fuse F64 (30 A). CHECK the operation of
the system. If the fuse blows again, LOCATE and
REPAIR the short using the Wiring Diagrams.
Connect fuse F64 (BJB).
1
Ignition switch in position II.
2
Measure voltage between fuse F64 (30 A) and
3
ground.
Does the meter display battery voltage?
Yes
GO to A4.
No
REPAIR the voltage supply to fuse F64 using the
Wiring Diagrams. CHECK the operation of the
system.
Ignition switch in position 0.
1
Disconnect connector C789 from blower motor.
2
Ignition switch in position II.
3
Measure the voltage between the blower motor,
4
connector C789, pin 1, circuit 15-FA18 (GN/OG),
wiring harness side and ground.
Does the meter display battery voltage?
Yes
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A9.