Pinpoint Test

1. Ignition OFF.
2. Place the headlamp switch in the headlamps on position.

Do the low beams illuminate? 

• Yes: If both high beams are inoperative, VERIFY the BCM fuse 39 (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.

  If an individual high beam is inoperative, GO to  3.

• No: REFER to Diagnostic Routine B: One Or Both Low Beams Are Inoperative .

1. Ignition ON.
2. Using a scan tool, view SCCM PIDs  .
3. Using a scan tool, monitor the SCCM FLASH-to-PASS and HEADLAMP_SW PIDs  while placing the multifunction switch in the flash-to-pass and high beam positions.

Do the PID values agree with the multifunction switch position? 

• Yes: GO to  8.
• No: INSTALL a new multifunction switch. REFER to STEERING COLUMN MULTIFUNCTION SWITCH . TEST the system for normal operation.

  If the concern still exists, INSTALL a new SCCM. REFER to STEERING COLUMN CONTROL MODULE (SCCM) .

1. Place the headlamp switch in the off position.
2. Disconnect: Inoperative Headlamp.
3. Place the headlamp switch in the headlamps on position and the multifunction switch in the high beam position.
4. Measure:

   Inoperative High Beam			Ground
   Headlamp			Ground
   Connector-Pin	Circuit	Measurement / Action	Pin	Circuit
   Left (Halogen) C1021A-3	CLF02 (GY/BN)		-	Ground
   Right (Halogen) C1041A-3	CLF03 (VT/OG)		-	Ground
   Left (HID) C1284A-3	CLF02 (GY/BN)		-	Ground
   Right (HID) C1285A-3	CLF03 (VT/OG)		-	Ground

Is the voltage greater than 11 volts? 

• Yes: For halogen headlamps, GO to 4  .

  For HID headlamps, INSTALL a new headlamp assembly. REFER to Headlamp Assembly .

• No: GO to  5.

1. Measure:

   Inoperative High Beam			Inoperative High Beam
   Headlamp			Headlamp
   Connector-Pin	Circuit	Measurement / Action	Connector-Pin	Circuit
   Left C1021A-3	CLF02 (GY/BN)		Left C1021A-4	GD120 (BK/GN)
   Right C1041A-3	CLF03 (VT/OG)		Right C1041A-4	GD123 (BK/GY)

Is the voltage greater than 11 volts? 

• Yes: INSTALL a new headlamp assembly. REFER to Headlamp Assembly .
• No: REPAIR the circuit in question.

1. Place the headlamp switch in the off position.
2. Ignition ON.
3. Using a scan tool, clear the DTCs  and perform the BCM self-test.
4. Place the headlamp switch in the headlamps on position and the multifunction switch in the high beam position.
5. Measure:

   Inoperative High Beam			Ground
   Headlamp			Ground
   Connector-Pin	Circuit	Measurement / Action	Pin	Circuit
   Left (Halogen) C1021A-3	CLF02 (GY/BN)		-	Ground
   Right (Halogen) C1041A-3	CLF03 (VT/OG)		-	Ground
   Left (HID) C1284A-3	CLF02 (GY/BN)		-	Ground
   Right (HID) C1285A-3	CLF03 (VT/OG)		-	Ground

Is the voltage greater than 11 volts? 

• Yes: INSTALL a new headlamp assembly. REFER to Headlamp Assembly .
• No: GO to 6  .

1. Ignition OFF.
2. Disconnect: BCM C2280E.
3. Measure:

   Inoperative High Beam			Ground
   Headlamp			Ground
   Connector-Pin	Circuit	Measurement / Action	Pin	Circuit
   Left (Halogen) C1021A-3	CLF02 (GY/BN)		-	Ground
   Right (Halogen) C1041A-3	CLF03 (VT/OG)		-	Ground
   Left (HID) C1284A-3	CLF02 (GY/BN)		-	Ground
   Right (HID) C1285A-3	CLF03 (VT/OG)		-	Ground

Is the resistance greater than 10, 000 ohms? 

• Yes: GO to 7  .
• No: REPAIR the circuit in question.

  If DTC U1000:00 is present, CLEAR the DTCs  and REPEAT the on-demand self-test (required to enable the high beam output driver if DTC U1000:00 is present).

  If DTC U3000:49 is present, 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) .

1. Measure:

   Inoperative High Beam			BCM
   Headlamp			C2280E
   Connector-Pin	Circuit	Measurement / Action	Pin	Circuit
   Left (Halogen) C1021A-3	CLF02 (GY/BN)		8	CLF02 (GY/BN)
   Right (Halogen) C1041A-3	CLF03 (VT/OG)		7	CLF03 (VT/OG)
   Left (HID) C1284A-3	CLF02 (GY/BN)		8	CLF02 (GY/BN)
   Right (HID) C1285A-3	CLF03 (VT/OG)		7	CLF03 (VT/OG)

Is the resistance less than 3 ohms? 

• Yes: GO to 8  .
• No: REPAIR the circuit.

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.