Symptom Chart

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart

Condition	Possible Sources	Action
No communication with the lighting control module (LCM)	Wiring, terminals or connectors LCM	REFER to MODULE COMMUNICATIONS NETWORK article.
No communication with the driver door module (DDM)	Wiring, terminals or connectors DDM	REFER to MODULE COMMUNICATIONS NETWORK article.
The courtesy lamps are inoperative	Fuse Wiring, terminals or connectors LCM	Go to Pinpoint Test A .
An individual courtesy lamp is inoperative	Wiring, terminals or connectors Interior lamp	Go to Pinpoint Test B .
The courtesy lamps stay on continuously	Wiring, terminals or connectors Door ajar switch Instrument panel dimmer switch DDM LCM	Go to Pinpoint Test C .
The courtesy lamps do not turn on with one door open	Wiring, terminals or connectors Door ajar switch DDM	Go to Pinpoint Test D .
The demand lighting is inoperative	Wiring, terminals or connectors LCM	Go to Pinpoint Test E .
An individual demand lamp is inoperative	Wiring, terminals or connectors Lamp assembly	Go to Pinpoint Test F .
The battery saver does not deactivate after timeout	Wiring, terminals or connectors LCM	Go to Pinpoint Test G .
The luggage compartment lamp is inoperative	Wiring, terminals or connectors Luggage lamp assembly Luggage compartment lid release solenoid LCM	Go to Pinpoint Test H .
The interior lamps are inoperative - from the instrument panel dimmer switch	Wiring, terminals or connectors Instrument panel dimmer switch LCM	Go to Pinpoint Test I .
The illuminated entry is inoperative when using the remote transmitter	Keyless entry system DDM	CHECK the operation of the keyless entry system from the keypad and the remote keyless entry transmitter. If the keyless entry system does not operate correctly, REFER to HANDLES, LOCKS, LATCHES & ENTRY SYSTEMS article. If the keyless entry system operates correctly, INSTALL a new DDM. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.