I saw this on the Gears and Gasoline Youtube channel: https://youtu.be/XgOowUWbCdk?t=628 -- looks like a lot of work to trace a parasitic drain.
South Main Auto
Watch Wes Work
musty1
https://www.youtube.com/@JimmyMakingitwork
lol @ Tavarish and Samcrac mentioned here, they are TV entertainers who are more concerned about drama. If you want to learn how to repair stuff, these guys are where its at ^