Troubleshooting Your Aircraft's Electrical System 

Good video, had a bad alternator come in and honestly had no clue how to seriously troubleshoot it professionally besides looking at the ammeter and saying it's good or bad

what are the parts of alternator of reciprocating engine

Diode and grounding leak most likely happened in cars drain battery over night

Why is he manhandling the power lever like that?

Just buy a new plane