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I called those little voltage testers a gimmick until one saved me a 3 hour callback
Back when I started fixing appliances in the early 2000s, I figured a meter and a screwdriver were all a guy needed, and those little non contact voltage pens looked like toys to me. Then about 6 months ago I was working on a dryer in a mobile home park outside of Tulsa and could not figure out why the heating element had no power, and my meter kept reading fine at the terminal block. A buddy lent me his pen tester and it lit up on a wire I had already tagged as dead, turns out the neutral was backfeeding through a burnt joint and I would have chased that for hours. Now it rides in my front pocket on every call, and it has caught live wires on 4 jobs since then where the breaker label was just plain wrong. Funny how the cheap little tool I laughed at is the one I reach for first now. Any of you still skip the pen tester or do you keep one handy on every truck?
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