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 Circuitry LCM	REFER to MULTIFUNCTION ELECTRONIC MODULES .
The control illumination is inoperative	Fuse Circuitry Lighting control module (LCM)	GO to PINPOINT TEST A .
The instrument cluster illumination is inoperative	Instrument cluster Lighting control module (LCM)	GO to PINPOINT TEST B .
The climate control illumination is inoperative	Circuitry Electronic automatic temperature control (EATC) unit Manual climate control	GO to PINPOINT TEST C .
The audio system illumination is inoperative	Circuitry Audio unit	GO to PINPOINT TEST D .
The steering wheel control switch(es) illumination is inoperative	Circuitry Clockspring Audio/climate control switch Speed control switch Steering wheel wiring harness Clockspring	GO to PINPOINT TEST E .
The power window switch illumination is inoperative	Power window switch	CHECK the operation of the power windows. If the power windows do not operate correctly, REFER to GLASS, FRAMES AND MECHANISMS . If the power windows operate correctly, INSTALL a new power window switch. REFER to GLASS, FRAMES AND MECHANISMS .
A single illumination source is inoperative	Fuse Circuitry Component	GO to PINPOINT TEST F .
The power door lock control switches illumination is inoperative	Fuse Circuitry Door lock switch(es)	GO to PINPOINT TEST F .
The heated seat control switches illumination is inoperative	Fuse Circuitry Heated seat control switch(es)	GO to PINPOINT TEST F .
The instrument panel illumination does not dim	Circuitry Instrument panel dimmer switch Lighting Control Module (LCM)	GO to PINPOINT TEST G .