GENERAL AR 2C9512 - Caterpillar

The connection of any electrical equipment and the disconnection of any electrical equipment may cause an explosion hazard which may result in injury or death. Do not connect any electrical equipment or disconnect any electrical equipment in an explosive atmosphere.
Refer to Special Instruction, REHS0354, "Charging System Troubleshooting" for the proper testing procedures.Probable Causes
Alternator drive belts
Charging circuit
Regulator
AlternatorRecommended Actions
Alternator Drive Belts
Inspect the condition of the alternator drive belts. If the alternator drive belts are worn or damaged, replace the belts.
Check the tension on the alternator drive belts. Adjust the tension, if necessary.Charging Circuit
Inspect the battery cables, wiring, and connections in the charging circuit. Clean all connections and tighten all connections. Replace any faulty parts.Alternator or Regulator
Verify that the alternator or the regulator is operating correctly. Refer to Special Instruction, REHS0354, "Charging System Troubleshooting" for the proper testing procedures. Repair the alternator or replace the alternator, as needed.