PINPOINT TEST M : All The Stoplamps Are Inoperative

M1 CHECK THE STOPLAMP SWITCH VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: Stoplamp Switch.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C278-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	GO to M2.
No	VERIFY the BJB fuse 59 (10A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short.

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.

M2 BYPASS THE STOPLAMP SWITCH

Connect a fused jumper wire:

Positive Lead	Measurement / Action	Negative Lead
C278-1	Courtesy of FORD MOTOR COMPANY	C278-4

Do the stoplamps illuminate?

Yes	REMOVE the jumper wire. INSTALL a new stoplamp switch. Refer to Stoplamp Switch .
No	LEAVE the jumper wire connected. GO to M3.

M3 CHECK THE STOPLAMP SWITCH INPUT CIRUCIT TO THE BCM FOR AN OPEN

Disconnect: BCM C2280B.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280B-28	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	REMOVE the jumper wire. VERIFY the BCM fuse 15 (15A) is OK. If OK, GO to M4. If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short.
No	REMOVE the jumper wire. REPAIR the circuit.

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.

M4 BYPASS THE BCM

Disconnect: BCM C2280D.

Connect a fused jumper wire:

Positive Lead	Measurement / Action	Negative Lead
C2280D-14	Courtesy of FORD MOTOR COMPANY	Positive Battery Terminal

Do the stoplamps illuminate?

Yes	REMOVE the jumper wire. GO to M5.
No	REMOVE the jumper wire. REPAIR the BCM stoplamp output circuit for an open.

M5 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.