If you learn anything, learn about circuit continuity. Set your multimeter for continuity, it's the best troubleshooting skill you can learn. Find out why techs say, "Ohm it out", or "buzz it out". Find short circuits, opens, test fuses, wiggle the wire test, test cables, switches, push buttons, find out where wires go on a pc board. You need to know this. I use my multimeter to demonstrate continunity testing, so you can see how it's done. A+ Certification.
