I am working on a Williams Grand Prix and I have it working well as a one player game. Clicking the credit button with player 1's ball in the shooter lane does not add additional players.

Here is the state of the game with the ball in the shooter lane:
Coin Unit is on player 1 i.e. at the reset position
Credit Unit is wired for free play with top 2 switches jumped and 0 position switch open but still fires the Credit Unit Reset Coil
Game Over relay is latched on
All reels show 0
Playfield switches are active

Pressing the Credit Button fires the reset relay. I am pretty sure this is wrong. Looking at the schematic (still a noob) I think the reset relay should not fire so the current can flow through a NC switch to the Coin Unit Step Up. As it is the Reset Relay fires the Coin Unit Reset and leaves it on single player.

Here is the relevant section of the Schematic:Schematic Partial (resized).png

What confuses me is the Game Over Relay NO switch that is letting current go to the Reset Relay. When latched isn't that switch going to always be closed?

Anybody see what I am missing?

Thanks

Fixed it. Was switch C on the game over relay. Looked open when latched but it was not