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. Most automotive batteries are lead acid 12-volt DC (Direct
Current). Each of the six cells in a 12-volt DC battery produces 2 to 2.1
volts. When the engine is running, the alternator will typically put out between
13.8 to 14.8 volts. Cautions: Park the vehicle outside or connect the vehicle's
exhaust to an evacuation system. Carbon monoxide is deadly. For more car care
information, visit AutoUpkeep.com.
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