Symptom Chart

WARNING: This page is about a different car, the 2010 Lincoln Town Car. 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 rear audio and temperature control (RATC) module	Fuse Wiring, terminals or connectors RATC module	REFER to MODULE COMMUNICATIONS NETWORK article.
The cassette player is inoperative	Audio unit	INSTALL a new audio unit. REFER to Audio Unit . TEST the system for normal operation.
The CD player/changer is inoperative/does not operate correctly	Audio unit	INSTALL a new audio unit. REFER to Audio Unit . TEST the system for normal operation.
Poor reception	Antenna Antenna cable Noise suppression equipment Charging system Ignition system Audio unit	Go to Pinpoint Test A .
Continuous seek/scan in AM/FM	Antenna cable Antenna Audio unit	Go to Pinpoint Test A .
Poor quality/distorted/no sound from one or more speakers (not all speakers)	Wiring, terminals or connectors Speaker Audio unit	Go to Pinpoint Test B .
Poor quality/distorted/no sound from all speakers	Wiring, terminals or connectors Audio unit	CHECK circuit 1000 (RD/BK) for voltage with the key in any position except START. If voltage is present, REPAIR the circuit. TEST the system for normal operation. If no voltage is present, INSTALL a new audio unit. REFER to Audio Unit . TEST the system for normal operation.
The subwoofer is inoperative	Fuse Wiring, terminals or connectors Subwoofer amplifier Audio unit	Go to Pinpoint Test D .
Loud popping sound when cycling the ignition switch	Fuse Wiring, terminals or connectors Subwoofer amplifier Audio unit	Go to Pinpoint Test C .
The audio unit illumination is inoperative	Wiring, terminals or connectors Audio unit	REFER to INSTRUMENT CLUSTER & PANEL ILLUMINATION article.
The steering wheel controls are inoperative	Wiring, terminals or connectors Clockspring Audio unit Steering wheel controls	Go to Pinpoint Test E .
The rear auxiliary audio controls are inoperative/do not operate correctly	Wiring, terminals or connectors Rear auxiliary audio controls RATC module Audio unit	Go to Pinpoint Test F .