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Home >> GMC >> 1981 >> Magnavan Standard Trans >> Repair and Diagnosis (Single Page) >> Electrical >> Motors, Switches, Relays >> Switches, Gauges & Instrument Panels >> Testing & Trouble Shooting >> Indicator Warning Lights >> Charging System Indicator

Charging System Indicator

  1. If light is on with ignition "OFF", check for shorted positive diode. If light is not on with ignition "ON" but engine not running, check for burned out bulb, open in light circuit or open in field.
  2. If light is on with engine running above idle speed, check for no generator output, shorted negative diode or loose or broken generator belt.