PINPOINT TEST T : One Or More Parking, Rear, Or License Plate Lamps Are Inoperative

T1 DETERMINE IF ALL THE PARKING LAMPS ARE INOPERATIVE

Ignition OFF.

Place the headlamp switch in the parking lamps on position.

Are all the parking lamps inoperative?

Yes

GO to T7.

If all the rear parking lamps are inoperative, VERIFY the BCM fuse 40 (10A) is OK. If OK, GO to T2. If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short. If all the front parking lamps are inoperative, VERIFY the BCM fuse 30 (15A) is OK. If OK, GO to T3. If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short. For any other inoperative lamp, GO to T4.

NOTE: If the fuse in the jumper wire fails, refer to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short.

T2 BYPASS THE BCM (REAR PARKING LAMPS)

Place the headlamp switch in the off position.

Disconnect: BCM C2280D.

Connect a fused jumper wire:

Positive Lead	Measurement / Action	Negative Lead
C2280D-18	Courtesy of FORD MOTOR COMPANY	Positive Battery Terminal

Do the rear parking lamps illuminate?

Yes	REMOVE the jumper wire. GO to T7.
No	REMOVE the jumper wire. REPAIR the BCM rear lamp voltage supply circuit for an open.

NOTE: If the fuse in the jumper wire fails, refer to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short.

T3 BYPASS THE BCM (FRONT PARKING LAMPS)

Place the headlamp switch to the off position.

Disconnect: BCM C2280E.

Connect a fused jumper wire:

Positive Lead	Measurement / Action	Negative Lead
C2280E-6	Courtesy of FORD MOTOR COMPANY	Positive Battery Terminal

Do the front parking lamps illuminate?

Yes	REMOVE the jumper wire. GO to T7.
No	REMOVE the jumper wire. REPAIR the BCM front lamp voltage supply circuit for an open.

T4 CHECK PARKING LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Place the headlamp switch in the off position.

Disconnect: Inoperative Lamp.

Place the headlamp switch in the parking lamps on position.

For a front parking lamp, measure:

Positive Lead	Measurement / Action	Negative Lead
Headlamp-Left (Halogen) C1021B-2	Courtesy of FORD MOTOR COMPANY	Ground
Headlamp-Right (Halogen) C1041B-2		Ground
Headlamp-Left (HID) C1284B-2		Ground
Headlamp-Right (HID) C1285B-2		Ground

For a rear parking lamp, measure:

Positive Lead	Measurement / Action	Negative Lead
Rear Lamp-Left C414-3	Courtesy of FORD MOTOR COMPANY	Ground
Rear Lamp-Right C417-3	Courtesy of FORD MOTOR COMPANY	Ground

For a license plate lamp, measure:

Positive Lead	Measurement / Action	Negative Lead
License Plate Lamp-Left C452-1	Courtesy of FORD MOTOR COMPANY	Ground
License Plate Lamp-Right C462-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	GO to T5.
No	REPAIR the circuit in question.

T5 CHECK THE INOPERATIVE PARKING LAMP GROUND CIRCUIT FOR AN OPEN

For a front parking lamp, measure:

Positive Lead	Measurement / Action	Negative Lead
Headlamp-Left (Halogen) C1021B-2	Courtesy of FORD MOTOR COMPANY	Headlamp-Left (Halogen) C1021B-1
Headlamp-Right (Halogen) C1041B-2		Headlamp-Right (Halogen) C1041B-1
Headlamp-Left (HID) C1284B-2		Headlamp-Left (HID) C1284B-1
Headlamp-Right (HID) C1285B-2		Headlamp-Right (HID) C1285B-1

For a rear parking lamp, measure:

Positive Lead	Measurement / Action	Negative Lead
Rear Lamp-Left C414-3	Courtesy of FORD MOTOR COMPANY	Rear Lamp-Left C414-1
Rear Lamp-Right C417-3	Courtesy of FORD MOTOR COMPANY	Rear Lamp-Right C417-1

For a license plate lamp, measure:

Positive Lead	Measurement / Action	Negative Lead
License Plate Lamp-Left C452-1	Courtesy of FORD MOTOR COMPANY	License Plate Lamp-Left C452-2
License Plate Lamp-Right C462-1	Courtesy of FORD MOTOR COMPANY	License Plate Lamp-Right C462-2

Is the voltage greater than 11 volts?

Yes	For a front parking lamp, For a front turn lamp, REPAIR the harness. If the harness cannot be repaired, INSTALL a new turn lamp harness. For a license plate lamp, INSTALL a new bulb socket. For a rear lamp, GO to T6.
No	REPAIR the ground circuit in question.

T6 CHECK THE REAR LAMP JUMPER HARNESS

Inspect the rear lamp jumper harness for opens.

Is the rear lamp jumper harness OK?

Yes	INSTALL a new rear lamp assembly. Refer to Rear Lamp Assembly .
No	REPAIR or INSTALL a new rear lamp jumper harness.

T7 CHECK FOR CORRECT BCM OPERATION

Disconnect and inspect all BCM connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the BCM connectors. Make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new BCM. REFER to Multifunction Electronic Modules - Without Intelligent Access or REFER to Multifunction Electronic Modules - With Intelligent Access .
No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.