You can use them to test for voltage drop at various circuits, blown fuses, current draws, heating elements, and to verify bad cable connections. The most common task is checking pedestal voltage.

Record the voltage that appears on your multimeter. If your power supply sticker shows a voltage of 135 volts, you should be seeing the same reading on the multimeter.

What is a multimeter anyway? Multimeters are covered in cryptic symbols and buttons, but don't let that intimidate you. There are three basic functions you'll use most often: measuring voltage ...

Testing the DC voltage output of the power supply using a digital multimeter can help you isolate any potential issues and determine if you have a bad power supply.