my side advance relay is sticking after the ball drains and spits out ball 2. looks like the schematic shows it somewhere in the side advance unit? i checked the right no.5 rollover button as that's in there too to control the advance relay, but that has good gap and is open. i even tried opening the button switch MORE when the side advance relay is stuck on, and nothing.

when side advance relay is stuck on, it's also holding the bell chime on and the side advance step up coil on. i can force the side advance relay off with my finger and it stays off. shoot the second ball and once it drains and shoots out ball 3, the side advance relay is stuck on again...

Yes sir, with the step up coil activated, it IS opening the yellow/grey-white switch

Thinking the game may have aftermarket wiring problems. I unsoldered the grey/white wire off the EOS switch and it still has the problem persisting. Also contacting the tilt pendulum, it energized the ball index relay, not the tilt relay…

Still trying to focus on the problem with the sticking side advance relay though. Noticing it happens when side advance unit is fully reset, or 3 clicks advanced is when it locks the relay. Also when locked, the hundred score reel(as well as 100 pt relay obviously) are energized as well. This happens on any player. Also none of the rollover switches 1-5, left or right, or the center one, are functional when the relay is stuck on. Flick the relay off with my finger and they operate/score

Got it!!! One of the button switches had the “middle” leaf (strong one to prevent movement) pushed up making a connection between the 2, acting as of the switch was closed. Found this by doing continuity checks with wires un soldered and that particular switch had continuity on the opposite end.