Symptom Chart: Interior Lighting

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to SERVICE INFORMATION , Diagnostic Methods for information regarding Ford-specific diagnostic practices.

Condition	Possible Sources	Actions
A module does not respond to the scan tool	Fuse Wiring, terminals or connectors Module	REFER to, COMMUNICATIONS NETWORK , Symptom Chart.
The courtesy lamps flash on and off	The BCM is not configured correctly.	CHECK the vehicle service history for recent service actions related to this module. This symptom is present due to incomplete or improper PMI procedures. REPEAT/PERFORM the PMI procedure as directed by the scan tool (MODULE COMMUNICATIONS NETWORK for further information).
The courtesy lamps do not illuminate with a door open	Wiring, terminals or connectors Door latch BCM	NOTE: Make sure that the dark car feature is not enabled in the BCM . The dark car feature disables activation of courtesy lamps due to a door unlock, door ajar or removing the key from the ignition cylinder. The feature can be disabled using a scan tool. GO to Pinpoint Test A .
The courtesy lamps do not illuminate with the liftgate open	Wiring, terminals or connectors Liftgate latch (manual liftgate) LTM (power liftgate) BCM	NOTE: Make sure that the dark car feature is not enabled in the BCM . The dark car feature disables activation of courtesy lamps due to a door unlock, door ajar or removing the key from the ignition cylinder. The feature can be disabled using a scan tool. GO to Pinpoint Test B .
The courtesy lamps do not illuminate from the courtesy lamp switch	FLM	OPEN a door and OBSERVE the courtesy lamps. If the courtesy lamps do not illuminate, GO to Pinpoint Test F. If the courtesy lamps illuminate, INSTALL a new FLM . REFER to FRONT LIGHTING CONTROL MODULE (FLM) .
One or more interior courtesy lamps are inoperative	Fuse Wiring, terminals or connectors Interior lamp BCM	GO to Pinpoint Test F
One or both puddle lamps are inoperative	Wiring, terminals or connectors Puddle lamp Exterior mirror BCM	GO to Pinpoint Test G .
All the courtesy lamps stay on continuously	Wiring, terminals or connectors Door latch Liftgate latch (manual liftgate) LTM (power liftgate) BCM	GO to Pinpoint Test J .
The interior courtesy lamps stay on continuously	Wiring, terminals or connectors BCM	GO to Pinpoint Test K .
The puddle lamps stay on continuously	Wiring, terminals or connectors BCM	GO to Pinpoint Test L .
One or more demand lamps are inoperative	Fuse Wiring, terminals or connectors Interior lamp BCM	GO to Pinpoint Test O .
The battery saver does not deactivate after timeout	Wiring, terminals or connectors BCM	GO to Pinpoint Test P .
An individual ambient lighting LED is inoperative/does not cycle through all color combinations	Ambient lighting harness	NOTE: The LEDs are not serviceable separate from the harness. REPAIR or INSTALL a new ambient lighting harness in question.
The ambient lighting is inoperative	Wiring, terminals or connectors HVAC module	GO to Pinpoint Test Q .
The ambient lighting does not cycle through all color combinations	Wiring, terminals or connectors HVAC module	GO to Pinpoint Test R .