What Is a Multimeter? A multimeter is a tool that measures electrical properties like resistance, voltage, and current. It is used to test electrical components such as diodes and capacitors.

This video covers the essential steps to properly test a car's alternator and diagnose common alternator issues. The guide ...

How To Test An Alternator? Using A Multimeter The easiest way to test an alternator is by using a multimeter. If that’s a tool you have on hand, just follow these instructions: Turn off the engine.