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)	Fuse Wiring, terminals or connectors LCM	REFER to MODULE COMMUNICATIONS NETWORK article.
The control illumination is inoperative	Fuse Wiring, terminals or connectors LCM	Go to Pinpoint Test A .
The instrument cluster (IC) illumination is inoperative	IC LCM	Go to Pinpoint Test B .
The climate control illumination is inoperative	Wiring, terminals or connectors Heating ventilation air conditioning (HVAC) module (if equipped) Climate control assembly (manual temperature control) Driver door module (DDM)	Go to Pinpoint Test C .
The audio system illumination is inoperative	Wiring, terminals or connectors Audio unit	Go to Pinpoint Test D .
The steering wheel control switch(es) illumination is inoperative	Wiring, terminals or connectors 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 & MECHANISMS article. If the power windows operate correctly, INSTALL a new power window switch. REFER to GLASS, FRAMES & MECHANISMS article.
A single illumination source is inoperative	Fuse Wiring, terminals or connectors Illumination source	Go to Pinpoint Test F .
The instrument panel illumination does not dim	Wiring, terminals or connectors Instrument panel dimmer switch LCM	Go to Pinpoint Test G .
The overhead console (with moonroof) illumination is inoperative	Wiring, terminals or connectors Overhead console (with moonroof)	Go to Pinpoint Test H .