Ford Galaxy / Ford S-MAX. Manual — part 797

Pinpoint Tests

NOTE: Use a digital multimeter for all electrical measurements.

lamp.

Liftgate latch motor.
CJB.

*
*

The glove compartment lamp is inoperative

Fuse(s).
Bulb(s).
Circuit(s).
Glove compartment

lamp.

CJB.
Battery saver relay.

*
*
*
*

*
*

GO to Pinpoint

Test

E.

*

The front footwell lamp(s) are inoperative

Fuse(s).
Bulb(s).
Circuit(s).
Front footwell lamp(s).
CJB.
Battery saver relay.

*
*
*
*
*
*

GO to Pinpoint

Test

F.

*

The vanity mirror lamp(s) are inoperative

Fuse(s).
Bulb(s).
Circuit(s).
Vanity mirror lamp(s).
CJB.
Battery saver relay.

*
*
*
*
*
*

GO to Pinpoint

Test

G.

*

The battery saver is inoperative/does not
operate correctly

Circuit(s).
Door module(s).
Door ajar switch(es).
CJB.

*
*
*
*

Refer to the

WDS.

*

PINPOINT TEST A : THE FRONT INTERIOR LAMP IS INOPERATIVE

TEST CONDITIONS

DETAILS/RESULTS/ACTIONS

A1: CHECK OPERATION OF THE INTERIOR LAMP

Check for operation of the interior lamp in both the
ON and DOOR OPEN positions.

1

Is the interior lamp inoperative in both positions?
Yes

GO to A3

.

No

If the interior lamp is inoperative in the ON position.

GO to A5

.

If the interior lamp is inoperative in the DOOR OPEN
position.

GO to A2

.

A2: CHECK CIRCUIT CLN27G (WH/BN) AND CIRCUIT CLN27B (WH/BN) FOR OPEN
CIRCUIT

Disconnect Front Interior Lamp C9LN28-B.

1

Disconnect CJB C1BP02-H.

2

Measure the resistance between the front interior
lamp C9LN28-B pin 1, circuit CLN27G (WH/BN),

harness side and the CJB C1BP02-H pin 20, circuit
CLN27B (WH/BN), harness side .

3

Is the resistance less than 1 ohm?
Yes

INSTALL a new front interior lamp. TEST the system
for normal operation.

No

REPAIR the circuit(s) as necessary. TEST the system
for normal operation. If the concern persists,
INSTALL a new CJB. TEST the system for normal
operation.

A3: CHECK CIRCUIT CBP17A (BN/GN) FOR VOLTAGE

Disconnect Front Interior Lamp C9LN28-A.

1

Measure the voltage between the front interior lamp
C9LN28-A pin 1, circuit CBP17A (BN/GN), harness

side and ground.

2

Is the voltage greater than 10 volts?
Yes

INSTALL a new front interior lamp. TEST the system
for normal operation. If the concern persists, GO to
Pinpoint Test

H.

No

GO to A4

.

A4: CHECK FRONT INTERIOR LAMP POWER CIRCUIT FOR OPEN CIRCUIT

Disconnect CJB C1BP02-C.

1

Measure the resistance between the front interior
lamp C9LN28-A pin 1, circuit CBP17A (BN/GN),

harness side and the CJB C1BP02-C pin 67, circuit
CBP17R (BN/GN), harness side.

2

Is the resistance less than 1 ohm?
Yes

GO to Pinpoint Test

H.

No

REPAIR circuit CBP17A (BN/GN) or circuit CBP17R
(BN/GN) as necessary . TEST the system for normal
operation.

A5: CHECK CIRCUIT GD138R (BK/WH) FOR GROUND

Disconnect the battery ground cable.
REFER to:

Battery Disconnect and Connect

(414-01

Battery, Mounting and Cables, General Procedures).

1

Disconnect Front Interior Lamp C9LN28-B.

2

Measure the resistance between the front interior
lamp C9LN28-B pin 2, circuit GD138R (BK/WH),

harness side and ground.

3

Is the resistance less than 1 ohm?
Yes

INSTALL a new front interior lamp. TEST the system
for normal operation.

No

REPAIR the circuit. TEST the system for normal
operation.

PINPOINT TEST B : THE MIDDLE INTERIOR LAMP IS INOPERATIVE

TEST CONDITIONS

DETAILS/RESULTS/ACTIONS

B1: CHECK OPERATION OF THE MIDDLE INTERIOR LAMP

Check for operation of the middle interior lamp in
both the ON and DOOR OPEN positions.

1

Is the middle interior lamp inoperative in both positions?
Yes

GO to B3

.

No

If the middle interior lamp is inoperative in the ON
position.

GO to B5

.

If the middle interior lamp is inoperative in the DOOR
OPEN position.

GO to B2

.

B2: CHECK CIRCUIT CLN27H (WH/BN) AND CIRCUIT CLN27B (WH/BN) FOR OPEN
CIRCUIT

Disconnect Middle Interior Lamp C9LN14-B.

1

Disconnect CJB C1BP02-H.

2

Measure the resistance between the middle interior
lamp C9LN14-B pin 1, circuit CLN27H (WH/BN),

harness side and the CJB C1BP02-H pin 20, circuit
CLN27B (WH/BN), harness side .

3

Is the resistance less than 1 ohm?
Yes

INSTALL a new middle interior lamp. TEST the
system for normal operation.

No

REPAIR the circuit(s) as necessary. TEST the system
for normal operation. If the concern persists,
INSTALL a new CJB. TEST the system for normal
operation.

B3: CHECK CIRCUIT CBP17B (BN/GN) FOR VOLTAGE

Disconnect Middle Interior Lamp C9LN14-A.

1

Measure the voltage between the middle interior
lamp C9LN14-A pin 1, circuit CBP17B (BN/GN),

harness side and ground.

2

Is the voltage greater than 10 volts?
Yes

INSTALL a new middle interior lamp. TEST the
system for normal operation. If the concern persists,
GO to Pinpoint Test

H.

No

GO to B4

.

B4: CHECK MIDDLE INTERIOR LAMP POWER CIRCUIT FOR OPEN CIRCUIT

Disconnect CJB C1BP02-C.

1

Measure the resistance between the middle interior
lamp C9LN14-A pin 1, circuit CBP17B (BN/GN),

harness side and the CJB C1BP02-C pin 67, circuit
CBP17R (BN/GN), harness side.

2

Is the resistance less than 1 ohm?
Yes

GO to Pinpoint Test

H.

No

REPAIR circuit CBP17B (BN/GN) or circuit CBP17R
(BN/GN) as necessary . TEST the system for normal
operation.

B5: CHECK CIRCUIT GD138X (BK/WH) FOR GROUND

Disconnect the battery ground cable.
REFER to:

Battery Disconnect and Connect

(414-01

Battery, Mounting and Cables, General Procedures).

1

Disconnect Middle Interior Lamp C9LN14-B.

2

Measure the resistance between the middle interior
lamp C9LN14-B pin 2, circuit GD138X (BK/WH),

harness side and ground.

3

Is the resistance less than 1 ohm?
Yes

INSTALL a new middle interior lamp. TEST the
system for normal operation.

No

REPAIR the circuit. TEST the system for normal
operation.