TM 5-3895-346-14
ENGINE OVERHAUL
TROUBLESHOOTING
ELECTRICAL SYSTEM TROUBLESHOOTING
CHECKING ENGINE ELECTRICAL GENERATING SYSTEM
Whenever trouble is indicated in the electrical generating system, the following quick checks can be made to
assist in localizing the cause.
1. A fully charged battery and low charging rate indicates normal generator-regulator operation.
2. A low battery and high charging rate indicates normal generator- regulator operation.
3. A fully charged battery and a high charging rate condition usually indicates the voltage regulator is set too
high or is not limiting the generator output. A high charging rate to a fully charged battery will damage the
battery and other electrical components.
4. A low battery and low or no charging rate could be caused by: Loose connections or damaged wiring,
defective battery or generator, generator not or improperly polarized, and defective regulator or improper
regulator setting.
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