Pinpoint Test B : An Individual Front Fog Lamp Is Inoperative

WARNING: This page is about a different car, the 2015 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

B1 CHECK FOR VOLTAGE TO THE INOPERATIVE FOG LAMP

Ignition OFF.

Disconnect: Inoperative LH Fog Lamp C152 or RH Fog Lamp C162 .

Ignition ON.

Place the headlamp switch in the PARKLAMPS position and engage the fog lamp switch.

Measure:

LH Fog Lamp

Positive Lead	Measurement / Action	Negative Lead
C152-B	Courtesy of FORD MOTOR COMPANY	Ground

RH Fog Lamp

Positive Lead	Measurement / Action	Negative Lead
C162-B	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to B3

No	GO to B2

B2 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE FOG LAMP

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

Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver if DTC U1000:00 is present).

Measure:

LH Fog Lamp

Positive Lead	Measurement / Action	Negative Lead
C152-B	Courtesy of FORD MOTOR COMPANY	Ground

RH Fog Lamp

Positive Lead	Measurement / Action	Negative Lead
C162-B	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	INSTALL a new front fog lamp bulb. REFER to: Front Fog Lamp Bulb .

No	GO to B4

B3 CHECK THE INOPERATIVE FOG LAMP GROUND CIRCUIT FOR AN OPEN

Measure:

LH Fog Lamp

Positive Lead	Measurement / Action	Negative Lead
C152-B	Courtesy of FORD MOTOR COMPANY	C152-A

RH Fog Lamp

Positive Lead	Measurement / Action	Negative Lead
C162-B	Courtesy of FORD MOTOR COMPANY	C162-A

Is the voltage greater than 11 volts?

Yes	INSTALL a new front fog lamp bulb. REFER to: Front Fog Lamp Bulb .

No	REPAIR the circuit.

B4 CHECK FOG LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO GROUND

Place the headlamp switch in the OFF position.

Ignition OFF.

Disconnect: BCM C2280G .

Measure:

LH Fog Lamp

Positive Lead	Measurement / Action	Negative Lead
C152-B	Courtesy of FORD MOTOR COMPANY	Ground

RH Fog Lamp

Positive Lead	Measurement / Action	Negative Lead
C162-B	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to B5

No	REPAIR the circuit. After the repair: If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation. If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present). If DTC U3000:49 is present, Refer to BCM Hardware Testing .

B5 CHECK FOG LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Measure:

LH Fog Lamp

Positive Lead	Measurement / Action	Negative Lead
C152-B	Courtesy of FORD MOTOR COMPANY	C2280G-12

RH Fog Lamp

Positive Lead	Measurement / Action	Negative Lead
C162-B	Courtesy of FORD MOTOR COMPANY	C2280G-5

Is the resistance less than 3 ohms?

Yes

GO to B6

No	REPAIR the circuit.

B6 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect all BCM and all related in-line 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 and all related in-line 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, Refer to BCM Hardware Testing .

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.