I finally decided enough was enough after the shame of calling a "pinball guy" to work on my 1977 Williams Liberty Bell, and decided that I should pick up a non working EM on the cheaper end of things and learn how to repair them on a non working one, rather than risk the health of my existing toy.
I came home with a bit more than I bargained for with a barn find 1975 Williams "Little Chief", non working. There were not that many issues with it and no real big issues, mostly a few small parts missing, a few solenoids gone bad, and the right side rail, and backbox cover plate retention hardware gone missing; but, overall, its really been a great experience in learning how to repair EM's and how they work, and I've fixed every major problem I've come across with it so far!
One final major problem I'm struggling with is the coin door. It seems like the coin door may have been sabotaged at one point when the machine was taken out of service. The coindoor wires were mostly hanging loose. I resoldered them and replaced the missing lock reloay coil and the coin door seems to be behaving correctly now besides closing the switch doesn't seem to result in the game adding a credit to the wheel. If I roll the wheel manually it detects there being a credit on the wheel and uses it and takes it off; but, I have to advance the wheel manually, the coin switch doesn't actuate it.