I am working on a 1969 Williams Miss-O and I’m trying to figure out why the “A”, “B”, “C”, “D” lights don’t reset between games. I am in 3 ball mode and do have the schematic. Not sure if it’s related, but the extra ball feature doesn’t seem to work correctly either. The extra ball relay comes on but it drops out before the ball reaches the out hole.
This is not the first pinball machine I’ve worked on, but this detail has me stumped. The manual doesn’t go to this level of depth.
Any help on how the game should work is appreciated. Feel free to ding me if I’ve screwed up any of the forum guidelines I’m comfortable soldering, using test tools, following schematics, and jumpering.