I'm working on a Grand Prix. I have the schematic. I am having a problem with the outhole switch and ball count. The game starts fine and plays fine for a ball or two, then either the ball kicks out but the ball count does not advance or the ball just sits in the outhole. Through experimentation I determined that the bonus unit was not properly resetting and that would result in the ball sitting in the outhole. For some reason I can't find the outhole switch on the schematic. I've found the outhole relay at several locations on the schematic but no switch. I can't trouble shoot how the outhole switch connects to the outhole relay through the bonus unit.
Also, does the schematic represent the game with power on in game over mode or the game started with the ball at the plunger?