How to use a multimeter to check voltage, resistance and polarity DIYers can use a voltmeter to check for voltage, resistance, polarity and even current flow. Here’s a step-by step in how to use a multimeter. Multimeter setup I’ll be using an inexpensive multimeter for this article. Most inexpensive multimeters have a dial to choose DC voltage, Ohms (resistance), Amps and Milliamps. Plus, the test leads have to be plugged into the correct ports. Here’s the setup for each of those readings. Multimeter setup for volts and polarity (top row … Read More
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