Symptom Chart

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 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)	Fuse(s) Circuitry LCM	REFER to MULTIFUNCTION ELECTRONIC MODULES .
No communication with the driver door module (DDM)	Fuse(s) Circuitry DDM	REFER to MULTIFUNCTION ELECTRONIC MODULES .
The alarm system does not operate correctly - does not trigger correctly or falsely triggers	Fuse(s) Circuitry Hood ajar switch Lighting control module (LCM)	GO to PINPOINT TEST A .
The alarm system does not disarm - using the driver door disarm switch	Circuitry Driver door disarm switch Driver door module (DDM) Lighting control module (LCM)	GO to PINPOINT TEST B .
The alarm system does not arm/disarm - using the remote keyless entry (RKE) transmitter or RKE keypad	RKE transmitter RKE keypad Driver door module (DDM) Lighting control module (LCM)	GO to PINPOINT TEST C .
The alarm system does not operate correctly - alarm does not activate when luggage compartment lid is armed and opened	Circuitry Luggage compartment lid ajar switch	REFER to INTERIOR LIGHTING .
The alarm system does not operate correctly - luggage compartment does not inhibit when the luggage compartment lid is opened with the key	Circuitry Luggage compartment anti-theft alarm inhibit switch Lighting control module (LCM)	GO to PINPOINT TEST D .