Pinpoint Test F : One Or Both Lower High Beams Is Inoperative - Vehicles With Halogen Headlamps

WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

F1 CHECK THE LOW BEAM OPERATION
- Ignition ON.
- Place the headlamp switch in the HEADLAMPS position.
- Place the LH steering column multifunction switch in the high beam position and observe the headlamps.
- Place the LH steering column multifunction switch in the low beam position and observe the headlamps.
Do the low beams illuminate?

Yes If both high beams are inoperative, GO to F2. If an individual high beam is inoperative, GO to F6

No GO to Pinpoint Test B

F2 CHECK FOR VOLTAGE FROM THE HEADLAMP HIGH BEAM CIRCUIT

Ignition OFF.

Place the headlamp switch in the OFF position.

Disconnect: LH Lower Headlamp C1509B .

Ignition ON.

Place the headlamp switch in the HEADLAMPS position and the LH steering column multifunction switch in the HIGH BEAM position.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1509B-3	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	INSTALL a new high beam headlamp bulb. Refer to: Headlamp Bulb .

GO to F3

F3 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE HEADLAMP LOW BEAM CIRCUIT

Place the headlamp switch in the OFF position and the LH steering column multifunction switch in the LOW BEAM position.

Using a diagnostic scan tool, perform the BCMB self-test.

Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).

Ignition OFF.

Ignition ON.

Place the headlamp switch in the HEADLAMPS position and the LH steering column multifunction switch in the HIGH BEAM position.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1509B-3	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	INSTALL a new high beam headlamp bulb. Refer to: Headlamp Bulb .

GO to F4

F4 CHECK THE HIGH BEAM CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Place the headlamp switch in the OFF position.

Disconnect: RH Lower Headlamp C1510B .

Disconnect: BCMB C263C .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1509B-3	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to F5

REPAIR the circuit. After the repair: If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation. If any BCMB Diagnostic Trouble Codes (DTCs) other than DTC U3000:49 are present, CLEAR the Diagnostic Trouble Codes (DTCs), REPEAT the self-test (required to enable the lamp output driver) and cycle the ignition OFF and ON. TEST the system for normal operation. If DTC U3000:49 is present, Refer to BCM Hardware Testing .

F5 CHECK THE HIGH BEAM SUPPLY CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1509B-3	Courtesy of FORD MOTOR COMPANY	C263C-3

Is the resistance less than 3 ohms?

Yes

GO to F8

No	REPAIR the circuit.

F6 CHECK FOR VOLTAGE TO THE HEADLAMP HIGH BEAM

Ignition OFF.

Place the headlamp switch in the OFF position.

Disconnect: Inoperative LH Lower Headlamp C1509B or RH Lower Headlamp C1510B .

Ignition ON.

Place the headlamp switch in the HEADLAMPS position and the LH steering column multifunction switch in the HIGH BEAM position.

Measure:

LH Headlamp

Positive Lead	Measurement / Action	Negative Lead
C1509B-3	Courtesy of FORD MOTOR COMPANY	Ground

RH Headlamp

Positive Lead	Measurement / Action	Negative Lead
C1510B-3	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to F7

No	REPAIR the circuit.

F7 CHECK THE HIGH BEAM SUPPLY CIRCUIT FOR AN OPEN

Ignition OFF.

Place the headlamp switch in the OFF position.

Disconnect: BCMB C263C .

Measure:

LH Headlamp

Positive Lead	Measurement / Action	Negative Lead
C1509B-3	Courtesy of FORD MOTOR COMPANY	C263C-3

RH Headlamp

Positive Lead	Measurement / Action	Negative Lead
C1510B-3	Courtesy of FORD MOTOR COMPANY	C263C-3

Is the resistance less than 3 ohms?

Yes	INSTALL a new high beam headlamp bulb. Refer to: Headlamp Bulb .

No	REPAIR the circuit.

F8 CHECK FOR CORRECT BCMB (BODY CONTROL MODULE B) OPERATION

Disconnect and inspect all BCMB 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 BCMB 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new BCMB. Refer to: Trailer Module (TRM) . The BCMB is mounted in the same place as the TRM.

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.