Ford Transit 2002 Owner's Manual page 1468

A5: CHECK THE GROUND CONNECTION OF THE BLOWER MOTOR
A6: CHECK THE CIRCUIT BETWEEN THE BLOWER MOTOR AND THE BLOWER SWITCH
A7: CHECK THE GROUND CONNECTION OF THE BLOWER SWITCH
GO to A5.
No
LOCATE and REPAIR break in circuit 15-FA18
(GN/OG), between blower motor and fuse F64 using
the Wiring Diagrams. CHECK the operation of the
system.
Ignition switch in position 0.
1
Set the blower switch to position 4.
2
Measure the resistance between the blower motor,
3
connector C789, pin 2, circuit 31S-FA18 (BK/RD),
wiring harness side and ground.
Is a resistance of less than 2 Ohm registered?
Yes
RENEW the blower motor. CHECK the operation of
the system.
No
GO to A6.
Disconnect connector C469 of heater blower
1
switch.
Measure the resistance between the blower motor,
2
connector C789, pin 2, circuit 31S-FA18 (BK/RD),
wiring harness side and the blower switch,
connector C469, pin 6, circuit 31S-FA33 (BK/OG),
wiring harness side.
Is a resistance of less than 2 Ohm registered?
Yes
GO to A7.
No
LOCATE and RECTIFY the open circuit in circuit 31S-
FA18 (BK/RD) between the blower motor and
soldered connection S24 with the aid of the Wiring
Diagrams. CHECK the operation of the system.
Measure the resistance between the blower switch,
1
connector C469, pin 2, circuit 31- FA25 (BK), wiring
harness side and ground.
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