Pinpoint Test

CHECK THE FOG LAMP SWITCH PID
1. Ignition ON.
2. Using a scan tool, view FLM PIDs .
3. Using a scan tool, monitor the FLM FOG_F_SW PID while pressing and releasing the fog lamp switch.
Does the PID indicate the fog lamp switch is active when pressed and inactive when released?
- Yes: VERIFY the BCM fuse 47 (15A) is OK. If OK, GO to 2 . If not OK, REFER to the appropriate OEM WIRING DIAGRAMS to identify the cause for the circuit short.
- No: INSTALL a new FLM. REFER to Front Lighting Control Module (FLM) .

BYPASS THE BCM

NOTE: If the fuse in the jumper wire fails, REFER to the appropriate OEM WIRING DIAGRAMS to identify the cause for the circuit short.

Ignition OFF.
Disconnect: BCM C2280E.

Connect a fused jumper wire:

BCM			Battery

C2280E			Positive
Pin	Circuit	Measurement / Action	Pin	Circuit
5	CLF12 (BN/YE)		-	Battery Positive

Do the fog lamps illuminate?

Yes: REMOVE the jumper wire. GO to 3 .
No: REMOVE the jumper wire. REPAIR the BCM fog lamp output circuit for an open.

CHECK FOR CORRECT BCM OPERATION
1. Disconnect and inspect all BCM connectors.
2. 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
3. Reconnect the BCM connectors. Make sure they seat and latch correctly.
4. 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 BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA) , or REFER to BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA) .
- 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.