Pinpoint Test D: The High Beams Are On Continuously

WARNING: This page is about a different car, the 2013 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

D1 CHECK THE MULTIFUNCTION SWITCH INPUT
- Ignition ON.
- Using a scan tool, view SCCM PIDs.
- Monitor the SCCM FLASH-to-PASS and HIGH_BEAM_SW PIDs while placing the multifunction switch in the flash-to-pass, high beam and rest positions.
- Do the PID values agree with the multifunction switch position?
- Yes : GO to D2.
- No : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES .
  If the concern still exists, INSTALL a new SCCM. REFER to STEERING COLUMN SWITCHES .

D2 CHECK THE HIGH BEAM VOLTAGE SUPPLY CIRCUIT FOR VOLTAGE

Ignition OFF.
Disconnect: Incorrectly Operating LH Headlamp C1021 or RH Headlamp C1041 (Halogen headlamps).
Disconnect: Incorrectly Operating LH Headlamp C1284 or RH Headlamp C1285 (HID Headlamps).
Ignition ON.
Make sure the multifunction switch in the rest position.

For halogen headlamps, measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LH Headlamp
C1021-3	CLF02 (GY/BN)	-	Ground
RH Headlamp
C1041-3	CLF03 (VT/OG)	-	Ground

Fig 1: Identifying Headlamp C1021 Connector Terminals (LH)

Courtesy of FORD MOTOR CO.

For HID headlamps, measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LH Headlamp
C1284-3	CLF02 (GY/BN)	-	Ground
RH Headlamp
C1285-3	CLF03 (VT/OG)	-	Ground

Fig 2: Identifying Headlamp C1284 Connector Terminals (LH)

Courtesy of FORD MOTOR CO.

Is any voltage present?

Yes : GO to D3.
No : INSTALL a new headlamp assembly. REFER to HEADLAMP ASSEMBLY .

D3 CHECK THE BCM HIGH BEAM OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF.
Disconnect: BCM C2280E.
Ignition ON.

For halogen headlamps, measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LH Headlamp
C1021-3	CLF02 (GY/BN)	-	Ground
RH Headlamp
C1041-3	CLF03 (VT/OG)	-	Ground

Fig 3: Identifying Headlamp C1021 Connector Terminals (LH)

Courtesy of FORD MOTOR CO.

For HID headlamps, measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
LH Headlamp
C1284-3	CLF02 (GY/BN)	-	Ground
RH Headlamp
C1285-3	CLF03 (VT/OG)	-	Ground

Fig 4: Identifying Headlamp C1284 Connector Terminals (LH)

Courtesy of FORD MOTOR CO.

Is any voltage present?

Yes : REPAIR the circuit.
No : GO to D4.

D4 CHECK FOR CORRECT BCM OPERATION
- Disconnect and inspect all the 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 On-Line Automotive Service Information System (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 .
- 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.