- Check the charging system wiring : Inspect the wiring between the alternator, battery, and starter solenoid for any damage or loose connections, clean corrosion from battery terminals/cables.
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- Test the voltage regulator: The voltage regulator controls the amount of current that flows from the alternator to the battery. A faulty voltage regulator can cause the battery to overcharge or undercharge.
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- Check the alternator belt: A loose or worn alternator belt can prevent the alternator from generating enough power to charge the battery.
