PT20J Posted September 28, 2022 Report Posted September 28, 2022 2 hours ago, EricJ said: Well, I'm an EE and an A&P and replaced my alternator about a year ago after a failure on a trip. I did a field repair to the field wire, which seemed to be loose, but it didn't fix it, so when I got home I started debugging. The zeftronics LEDs said the field was shorted, which I confirmed with a multimeter (displaying voltage), so I replaced the alternator. The new one didn't work, either, and I discovered that when I did the field repair I'd shorted a stray strand of the shield of the field wire to the wire when I recrimped it. D'oh. So my field repair would have worked just fine and cured the problem except I snagged that strand of the shield in the crimp. Anyway, now I have a spare alternator. I have a lot of stories of my own like this 1
Airstevo Posted October 2, 2022 Author Report Posted October 2, 2022 With some more testing with me pretty useless except for running the engine while the a&p measured everything he could get his multimeter on, we(he) decided it was the alternator. That’s been replaced and it’s working fabulously. Really happy to be finally flying it and learning to fly this fun airplane. Thank you all for the different insights and help 2
Betty_the_Mooney Posted January 23, 2023 Report Posted January 23, 2023 For anyone who likes chasing electrical gremlins, I just posted a thread with my own issues on my M20F https://mooneyspace.com/topic/44572-new-electrical-problem-thread/
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