It's a must-have for any toolbox—but there's a learning curve involved. Learn how to use a multimeter for all of your electrical testing needs.

If your power supply has an on/off switch, turn the power supply on. Switch your multimeter to the range that is appropriate for reading the voltage from your power supply.

You can then use the multimeter’s continuity tester along with a scrap piece of wire that stretches between the two switch boxes to determine the two traveler wires.

Car batteries don't just die. Something is sucking up all its power. A parasitic draw test helps you find out which part is to blame.

How do you know if a resistor is correctly restricting the flow of electricity? Using a multimeter is an obvious answer. However, there is more to it than meets the eye. This article will explain ...

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