Worse than that, they actually wired it to the reset relay. Which is just wrong. They could play single player games somewhat, but it was not resetting all the state correctly. I also noticed when I went to desolder it that it was just twisted around the tab. Discovered a lot of this. Guess they didn't own a soldering iron.
Every wire going to the coin door had been cut, and twisted with speaker wire and rerouted and electrical taped. It has all been pulled out now and rewiring it is my next step.
Got most of the scoring working today.
If I remember correctly, Ballys you can activate the score relays and it will test correctly even if not in a game. Looks like ZZZ are like gottleib and you need to be in a game. Since none of the 100 reels where rolling over, I figured it was the 100 point relay itself that had the problem. And of course it is the one switch that is stacked 2 deep that is hard to adjust. Unscrewed the bracket, cleaned the switch and gapped it and players 1, 2 and 4 worked.
Took a look at the position 9 switch on player 3 and the wire was broken off. Quick resoldering and all score reels worked in all positions.
Next tested the 500, and 5000 relays they seem to work correctly most of the time. Strangely, the 5000 seems to stop advancing when the digit is 7. It seems to be activating the special and possibly extra ball relays. That is something for another day.
I said I was not going to post frequently, and then posted every day. Long weekend was unusually quiet and got some time. Probably playing in events next two weekends, so it might be a few weeks before the next update.