Great - You got the "Ball-Count-Unit-TOTAL-Reset-Step" working (do not have the spring TIGHT).
From ipdb, here: http://www.ipdb.org/machine.cgi?id=289 , schema --- I made a snippet of "We might have to look at - put together pieces of schema" ...
Some theory: Gottlieb pins are wired DIFFERENT***, Williams and Bally use the same logic in wiring. Williams made loooong schemas - rather narrow --- Bally wanted to use another format for print-out.
It is NOT true (they run Alternate current) - I simplify and say "some kind of a 48 Volt 'battery' sits in the pin and a 6 Volt 'battery' also sits there - the 'Minus-Poles' of the two 'batteries' are connected - this is Wire-Yellow".
Bally wanted another format for print-out --- they folded the wiring "JPG-yellow" around and aoround --- see it in my JPG ?
(JPG-burgundy-red) 48 Volt POWER runs to fuse, then (JPG-red) some coils on relays and stepper-units have 'direct' connection (no switch in the line). Then (JPG-orange and JPG-rosa) some coils on relays and stepper-units have connection (but one or more switches in the line).
ALL COILS ON ALL STEPPERS AND RELAYS HAVE one side +/- directly connected to (Battery) Transformer-POWER-Side.
The same applies to "6 Volt-side".
Your "starting problems": I like to manually put some points on the Score-Reels (of Player-1) so I can see if the pin wants to reset the Score-Reels. My JPG-light-green-stuff is about "Resetting Score-Reels".
Your "Ball-Count-Unit does not reset": Unplug main power chord - manually step the Coin-Unit to position 2 or 3 or 4, manually step the Player-Unit to position 2 or 3 or 4, manually step the Ball-Count-Unit to position 2 or 3 or 4 or 5 or 6.
Then start a game --- big question: Do these Units (at the same time) make a "Total-Reset" ? Or just one Unit or what ?
Not to overload this post: Switches "JPG-dark-green-5 and ... -4" should move (as Reset-Relay, light-green-9 pulls-in --- because the Coin-Relay (miraculously) pulls-in and closes Switch-light-green-4) - JPG-dark-green-1 and ...-2 and ...-3 should actuate and make the "Total-Reset".
Gottlieb pins are wired DIFFERENT*** - (I prefer Williams and Bally wiring): Gottlieb runs POWER to switches - coils on relays and steppers are mounted in the RETURNING wiring.
Report - we might have to use Jumper-Wires to force "flow of electricity" (((just an example - don't do it now: Jumper-Connection "Transformer-lug-8-wire-yellow to Lug on coil on Ball-Count-Unit on bottom-side in the JPG-drawing))). Greetings Rolf
P.S.: I put numbers in the JPG - we might use. The "marked-brown" stuff is for "ball is played --- pin shall step to next player / next ball".
P.P.S.: For me to learn about: I made a "PDF 237 KB" from my "JPG 431 KB" - I uploaded the PDF - I wonder how this will show / look - If it is of no use: I will upload the JPG.