Symptom Chart

WARNING: This page is about a different car, the 2003 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
The battery is discharged or battery voltage is low	Circuitry. High key-off current drain(s). Battery. Generator.	Go To PINPOINT TEST A .
The charging system warning indicator is ON with the engine running (the charging system voltage does not increase)	Generator. Rear battery junction box (BJB) fuse 15 (5A). Circuitry.	Go To PINPOINT TEST B .
The charging system overcharges (battery voltage is greater than 15.5 volts)	Rear battery junction box (BJB) fuse 15 (5A). Circuitry. Generator.	Go To PINPOINT TEST C .
The charging system warning indicator is ON with the engine running and the battery increases voltage	Rear battery junction box (BJB) fuse 15 (5A). Generator. Instrument cluster. Powertrain control module (PCM). Circuitry.	Go To PINPOINT TEST D .
The charging system warning indicator is OFF with the ignition switch in the RUN position and the engine off	Generator connector unplugged C102a. Battery. Circuitry. Instrument cluster. Powertrain control module (PCM).	Go To PINPOINT TEST E .
The charging system warning indicator flickers or is intermittent	Rear battery junction box (BJB) fuse 15 (5A). Generator connector unplugged C102a. Circuitry. Generator.	Go To PINPOINT TEST F .
The generator is noisy	Loose bolts or brackets. Drive belt. Generator or pulley.	Go To PINPOINT TEST G .
Radio interference	Generator. Wiring or routing. In-vehicle entertainment system.	Go To PINPOINT TEST H .