Mike Plezia explains how to read a multimeter by understanding what the numbers mean. Voltage shows circuit pressure, resistance shows opposition, and continuity shows if a path is complete. You need to know what normal looks like—24 V at a transformer, near-zero ohms across a closed contactor, a steady beep on a good wire—before you can spot what's wrong.
Hey, are you new to the trades? Here's something you may not know about your multimeter: it's only useful if you understand what it's telling you. Voltage, resistance, continuity— these aren't just settings on a dial; they're questions you're asking the circuit. What's the pressure? What's opposing the flow? Is the path complete? Every reading means something. And here's the key: you have to know what a good reading looks like before you can recognize a bad one. 24 volts at the transformer secondary. Near-zero ohms across a closed contactor. A steady beep on a good wire run. Learn those baselines. Build that picture in your head of what normal looks like. Because when something's wrong, the meter will tell you. It doesn't lie. It just shows you what's there. Your job is to understand what that means. Now that you know, you can help someone else know.
