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rveg 1/3/2012
1996 Toyota T100 DLX 6 Cyl 3.4L - Preventive Maintenance
Why does my battery voltage gauge fluctuate when I turn on heater, blinkers? Had battery and alternator checked. Ok
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  • Spoon Sports
    Spoon Sports 1/4/2012
    The battery in your car does not constantly charge while driving. Electricity is needed to run the headlights, starter, radio, etc. In order to save wear on the alternator/generator, the battery is sometimes used to power these electrical devices as your car's internal sensors see fit. When the battery's charge drops below a certain voltage, the alternator kicks in again to keep the battery at its optimum level.

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