I'm working on a 1965 Williams Bowl-A-Strike. I went thru all coils and found a few that need replacement. I started with the chime relay that was shorted. I then moved to the lock relay, which was measuring low resistance compared to charts online and looked partially burned up. The game would play mostly after I replaced the chime unit.
But, when I replaced the lock relay, I have a new issue that popped up. I now get a green arc across one switch on the coin relay bank, which fires after the lock relay when I push the start button (simulates coin insert). The coin relay is a Williams Z35-4200 coil. I cannot find the resistance on any lists, so when I keep getting 215 ohms using DMM, I think something is wrong. However, I have a project 1961 Williams Ten Spot with that same relay and I'm getting a similar resistance. So maybe it's fine.
Not sure what to do. Any ideas?