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Symptom Chart: Notes

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. 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.
  • The charging system warning indicator is on with the engine running (the charging system voltage does not increase)
  • Bussed electrical center (BEC) fuse 50(10A).
  • Circuitry.
  • Generator.
  • Powertrain control module (PCM).
  • The charging system overcharges (battery voltage is greater than 15.5 volts)
  • Circuitry.
  • Generator.
  • Powertrain control module (PCM).
  • The charging system warning indicator is on with the engine running and the battery increases voltage
  • Circuitry.
  • Generator.
  • Instrument cluster.
  • Powertrain control module (PCM).
  • The charging system warning indicator is off with the ignition switch in the RUN position and the engine off
  • Instrument cluster.
  • Powertrain control module (PCM).
  • The charging system warning indicator flickers or is intermittent
  • Instrument cluster.
  • The generator is noisy
  • Loose bolts/brackets.
  • Drive belt.
  • Generator/pulley.
  • Radio interference
  • Generator.
  • Wiring/routing.
  • In-vehicle entertainment system.
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