Ford Galaxy / Ford S-MAX. Manual — part 630

No

RENEW fuse F28 (40 A). CHECK the operation of
the system. If the fuse blows again, LOCATE and
REPAIR the short using the Wiring Diagrams.

A3: CHECK THE VOLTAGE AT FUSE F28

Connect Fuse F28 (EJB).

1

Measure the voltage between fuse F28 (40 A) and
ground.

2

Does the meter display battery voltage?
Yes

GO to A4

.

No

REPAIR the voltage supply to fuse F28 with the aid
of the Wiring Diagrams. CHECK the operation of the
system.

A4: CHECK FUSE F33

Ignition switch in position 0.

1

CHECK Fuse F33 (EJB).

2

Is the fuse OK?
Yes

GO to A5

.

No

RENEW fuse F33 (5 A). CHECK the operation of the
system. If the fuse blows again, LOCATE and
REPAIR the short using the Wiring Diagrams.

A5: CHECK THE VOLTAGE AT FUSE F33

Connect Fuse F33 (EJB).

1

Measure the voltage between fuse F33 (5 A) and
ground.

2

Does the meter display battery voltage?
Yes

GO to A6

.

No

REPAIR the voltage supply to fuse F33 with the aid
of the Wiring Diagrams. CHECK the operation of the
system.

A6: CHECK VOLTAGE AT BLOWER MOTOR

Disconnect Connector C2H123-C from the blower
motor.

1

Ignition switch in position II.

2

Measure the voltage between the blower motor,
connector C2H123-C, pin 1, circuit CBB28C

(GY/VT), wiring harness side and ground.

3

Does the meter display battery voltage?
Yes

GO to A7

.

No

GO to A10

.

A7: CHECK GROUND CONNECTION OF BLOWER MOTOR

Ignition switch in position 0.

1

Set the blower switch to position 4.

2

Measure the resistance between the blower motor,
connector C2H123-C, pin 2, circuit CBB28D

(WH/VT), wiring harness side and ground.

3

Is a resistance of less than 2 Ohms registered?
Yes

RENEW the blower motor. CHECK the operation of
the system.

No

GO to A8

.

A8: CHECK THE GROUND CONNECTION OF THE BLOWER SWITCH

Disconnect Connector C2H426 from the blower
switch.

1

Measure the resistance between the blower switch,
connector C2H426, pin 5, circuit GD138BY

(BK/WH), wiring harness side and ground.

2

Is a resistance of less than 2 Ohms registered?
Yes

GO to A9

.

No

LOCATE and REPAIR the break in the circuit
between the blower switch and ground connection
G6D139 with the aid of the Wiring Diagrams.
CHECK the operation of the system.

A9: CHECK CIRCUIT BETWEEN THE BLOWER MOTOR AND THE BLOWER SWITCH FOR
OPEN CIRCUIT

Measure the resistance between the blower motor,
connector C2H123-C, pin 2, circuit CBB28D

(WH/VT), wiring harness side and the blower
switch, connector C2H426, pin 4, circuit CBB28B
(WH/VT), wiring harness side.

1

Is a resistance of less than 2 Ohms registered?
Yes

RENEW the blower switch. CHECK the operation of
the system.

No

LOCATE and REPAIR the break in the circuit
between the blower motor and soldered connection
SP175 using the Wiring Diagrams. CHECK the

operation of the system.

A10: CHECK THE VOLTAGE AT THE BLOWER RELAY H402

Ignition switch in position 0.

1

Disconnect Blower relay H402 from socket C1BB01-
A.

2

Measure the voltage at the blower relay H402,
socket C1BB01-A, pin 39, circuit SBB33E (RD),

wiring harness side and ground.

3

Does the meter display battery voltage?
Yes

GO to A11

.

No

LOCATE and REPAIR the break in the circuit
between the blower relay H402 and fuse F33 using
the Wiring Diagrams. CHECK the operation of the
system.

A11: CHECK THE VOLTAGE AT THE BLOWER RELAY H402

Measure the voltage at the blower relay H402,
socket C1BB01-A, pin 37, circuit SBB28A (RD/GN),

wiring harness side and ground.

1

Does the meter display battery voltage?
Yes

GO to A12

.

No

LOCATE and REPAIR the break in the circuit
between the blower relay H402 and fuse F28 using
the Wiring Diagrams. CHECK the operation of the
system.

A12: CHECK THE CIRCUIT BETWEEN THE BLOWER RELAY H402 AND THE BLOWER
MOTOR FOR OPEN CIRCUIT

Measure the resistance between the blower relay
H402, socket C1BB01-A, pin 36, circuit CBB28B

GY/VT), wiring harness side and the blower motor,
connector C2H123-C, pin 1, circuit CBB28C
(GY/VT), wiring harness side.

1

Is a resistance of less than 2 Ohms registered?
Yes

GO to A13

.

No

LOCATE and REPAIR the break in the circuit
between blower relay H402 and the blower motor
using the Wiring Diagrams. CHECK the operation of
the system.

A13: CHECK THE CIRCUIT BETWEEN BLOWER RELAY H402 AND THE CJB FOR OPEN
CIRCUIT

Disconnect Connector C1BP02-A from the CJB.

1

Measure the resistance between blower relay H402,
socket C1BB01-A, pin 38, wiring harness side and

the CJB, connector C1BP02-A, pin 28, circuit
CH123A (GN/VT), wiring harness side.

2

Is a resistance of less than 2 Ohms registered?
Yes

CHECK blower relay H402 in accordance with the
component checks at the end of the section. If
blower relay H402 is OK, CHECK and of necessary
RENEW the CJB. CHECK the operation of the
system.

No

LOCATE and REPAIR the break in the circuit
between blower relay H402 and the CJB using the
Wiring Diagrams. CHECK the operation of the
system.

A14: CHECK CIRCUIT BETWEEN THE BLOWER MOTOR AND THE BLOWER SWITCH FOR
OPEN CIRCUIT

Ignition switch in position 0.

1

Disconnect Connector C2H123-C from the blower
motor.

2

Disconnect Connector C2H426 from the blower
switch.

3

Measure the resistance between the blower motor,
connector C2H123-C, pin 2, circuit CBB28D

(WH/VT), wiring harness side and the blower
switch, connector C2H426, pin 4, circuit CBB28B
(WH/VT), wiring harness side.

4

Is a resistance of less than 2 Ohms registered?
Yes

RENEW the blower switch. CHECK the operation of
the system.

No

LOCATE and REPAIR the break in the circuit
between the blower switch and soldered connection
SP175 using the Wiring Diagrams. CHECK the
operation of the system.

A15: CHECK THE VOLTAGES AT THE BLOWER SWITCH

Ignition switch in position 0.

1

Disconnect Connector C2H426 from the blower
switch.

2

Ignition switch in position II.

3

Measure the voltage between the blower switch,
connector C2H426, pin 1, circuit CH427A (BN),

wiring harness side and ground.

4