Back in the day at the MRO in Wichita, we had to trace every wire by hand

Now I see a lot of newer folks just trusting the digital manual for a wire run without doing a physical continuity check first. That bit me last year on a G1000 install where the book was wrong about a pin location on connector J400. It matters because you can ground a bus or worse. Anyone else still do the old school ring-out on every new harness?

2 comments

2 Comments

the_piper22d ago

Man, I read a story about a guy who fried an entire avionics suite because the manual's wire diagram was flipped. Trust but verify, every single time. Digital is great until it's wrong, and then you're holding the bag. My rule is if the plane doesn't fly without it, my meter gets used first. Skipping the ring-out is just asking for a bad day.

willow_lee22d ago

Ever think you could just trust the new digital guides? I used to, until I followed a video tutorial to wire a new light fixture in my old house. The guy swore his diagram was right, but my whole kitchen circuit blew. Turns out he mixed up the neutral and hot wires. Now I test everything myself with a cheap voltage tester, even if the source seems solid. That one mess up changed how I do any home project.