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Alternator Indicator

  1. Alternator lamp should be on when ignition is "ON" and engine is not running. If lamp is on with ignition "OFF", disconnect leads from alternator 1 and 2 terminals. If lamp stays on, leads are shorted. If lamp goes out, replace rectifier bridge in alternator.
  2. If lamp does not come on with ignition "ON" and engine stopped, check bulb, fuse, and wire from ignition switch to terminal 1 at alternator. If no problems are found, check for shorts between terminals 1 and 2, and replace rectifier.
  3. If lamp stays on with engine running, check for blown A/C fuse. If fuse is good, check belts and alternator.
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