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Alternator Signal

  1. Ensure battery is fully charged and that all terminals and connections are tight. Set ignition switch to RUN position with engine off. The charge indicator light should be on. If indicator light is off, unplug wiring harness from alternator.
  2. Connect a fused (5-amp) jumper wire between harness connector terminal "L" and ground. If charge indicator light comes on, replace alternator.
  3. If charge indicator light does not come on, check for open circuit between ignition switch and alternator harness connector. If circuits are okay, check charge indicator light bulb. Replace if necessary.
  4. Start and maintain engine speed at moderate speed. Charge indicator light should be off. If light stays on, unplug wiring harness at alternator. If indicator light turns off, replace alternator. If indicator light stays on, check for shorted harness between connector and indicator light.
  5. Check battery for overcharged or undercharged condition. See the UNDERCHARGED OR OVERCHARGED BATTERY  test.
CAUTION: DO NOT ground terminals except as instructed. Avoid operation with battery out of circuit or output terminal open.
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