Testing Alternator Output Voltage

How to Test Alternator Voltage Output (AutoUpkeep.com)

After watching this video, you will be able to safety test alternator voltage output. This test can be completed using a basic multimeter (~$25). Multimeters are also known as VOMs (Volt-Ohm-Meters) or DMMs (Digital Multimeters). The surface voltage of a fully charged battery when a vehicle is not running should be between 12.5 to 12.8 volts ...

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Low priced Alternator output tester | Amazon.com Official Site