Pinpoint Test A : Both Front Fog Lamps Are Inoperative
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Both Front Fog Lamps Are Inoperative
Refer to Fog Lamps for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Exterior Lighting - Overview .
REFER to: Exterior Lighting - System Operation and Component Description .
Possible Sources
- Wiring, terminals or connectors
- Headlamp switch
- Headlamps concern
- BCM
Visual Inspection and Diagnostic Pre-checks
- Inspect the headlamp switch for damage.
- A1 CHECK THE LOW BEAM OPERATION
- Ignition ON.
- Place the headlamp switch in the HEADLAMPS then the OFF position.
Do the low beams operate correctly?
Yes GO to A2 No REFER to: Headlamps . - A2 CHECK THE HEADLAMP SWITCH
- Ignition OFF.
- Disconnect: Headlamp Switch C205.
- Carry out the headlamp switch component test. Refer to Component Testing for schematic and connector information.
Does the headlamp switch pass the component test?
Yes GO to A3 No INSTALL a new headlamp switch. REFER to: Headlamp Switch . - A3 CHECK THE BCM (BODY CONTROL MODULE) FOG LAMP SWITCH INPUT CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: BCM C2280B.
Is the resistance less than 3 ohms?
Yes GO to A4 No REPAIR the circuit. - A4 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
- Disconnect and inspect all 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 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 Guided Routine . 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.