Symptom Chart

WARNING: This page is about a different car, the 2007 Ford Ranger. 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	High key-off current drain(s) Engine, generator and battery grounds Positive battery cable Generator B+ circuit SDC02 (RD) high resistance 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)	Circuitry Voltage regulator Generator	Go to Pinpoint Test B .
The charging system overcharges (battery voltage is greater than 15.5 volts)	Circuitry Voltage regulator Generator	Go to Pinpoint Test C .
The charging system warning indicator is on with the engine running and the battery increases voltage	Circuitry Instrument cluster (IC) Voltage regulator Generator	Go to Pinpoint Test D .
The charging system warning indicator is off with the ignition switch in the RUN position and the engine off	Bulb Circuitry Instrument cluster (IC) Voltage regulator Generator	Go to Pinpoint Test E .
The charging system warning indicator flickers or is intermittent	Corroded terminal(s) Fuse(s) Circuitry Voltage regulator Generator Chaffed wiring (near water pump)	Go to Pinpoint Test F .
The generator is noisy	Accessory drive belt Loose bolts/brackets Generator/pulley	Go to Pinpoint Test G .
Radio interference	Generator In-vehicle entertainment system	Go to Pinpoint Test H .