Learn how to use a multimeter to measure voltage and continuity of resistors, capacitors, diodes, and transistors in a circuit board.

For automotive circuits, we recommend an auto-ranging meter with at least 20MΩ of internal resistance. Make sure to use the correct multimeter setting for a car battery.

Step 5: Test the voltage with the multimeter Place the black probe of the multimeter to the black pin of the 24-pin ATX connector. Then, place the red probe on one of the yellow wires. The yellow wire ...