Pinpoint Test A: Both Front Fog Lamps Are Inoperative Or Always On

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Wiring Diagrams 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
- BCM
Visual Inspection and Pre-checks
- Inspect the headlamp switch for damage.

A1 CHECK THE HEADLAMP SWITCH

Ignition ON.

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

Are any headlamp switch module BCM Diagnostic Trouble Codes (DTCs) present?

Yes	REFER to: Headlamps .

No	INSTALL a new headlamp switch. REFER to: Headlamp Switch . TEST the system for normal operation. If the condition returns, GO to A2

A2 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 service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM. REFER to: Body Control Module (BCM) .

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.