CONDITION POSSIBLE SOURCE ACTION
Dead battery.
Battery will not stay charged.
Slow crank.
Low battery voltage.
No generator output.
• Key-off battery drain.
• Open/voltage drop in B+ circuit.
• Open voltage drop in A circuit.
• Open/high resistance in I circuit.
• Voltage regulator.
• Generator.
Repair as necessary
Indicator lamp on with engine running.
• Open "A" circuit.
• Shorted "I" circuit.
• Open/high resistance in "S" circuit.
• Voltage regulator.
• Generator.
Repair as necessary.
Indicator lamp flickers or intermittent.
• Loose connection to generator, voltage
regulator or battery.
• Loose fuse or poor connection in "A"
circuit.
• Loose brush holder screw.
• Voltage regulator.
• Generator.
Repair as necessary.
Battery over charging (battery voltage
greater than 15.5 volts).
• Voltage drop in "A" circuit.
• Voltage drop in "I" circuit.
• Poor ground.
• Voltage regulator.
• Generator.
Repair as necessary.
Indicator lamp off, key on, engine not
running.
• Open/high resistance in "I" circuit.
• Burned out bulb.
• Poor ground.
• "S" circuit shorted to B+.
• Voltage regulator.
• Generator.
Repair as necessary.
Generator noisy.
• Accessory drive belt.
• Accessory brackets.
• Bent generator pulley.
• Generator.
• Other components.
Repair as necessary.
Indicator lamp on, key off.
• Lamp circuit shorted to B+.
• Improper lamp circuit wiring.
Repair as necessary
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