Hi knxwledge
not yet "troubleshooting" - in a functioning Air Aces we press the Credit-Button - the Credit-Relay pulls in and makes the Coin-Relay to actuate (I'd prefer the name Start-Relay instead of Coin-Relay). Bally pins are dangerous - they operate 110VAC and most of the coils 48VAC - current can kill You - ALWAYS wear rubber gloves or use an wooden stick when You want to activate an relay manually (or work in the pin). Please try: Activate the Coin-Relay to start a new game.
I am interested in: You have "started" a game - You do not play through the balls, You toggle-off the main power switch - NOW look at the Game-Over-Relay and toggle-on the main power switch - big question: Doing so - does the Game-Over-Relay actuate (trips) ?
I live in Switzerland - about 8 hours ahead of You - soon I will go to sleep. Greetings Rolf

Hi Dylan
see my JPG - encircled green, B --- look up in the schematics at E33 to E43 and You will see that for stepping the Score-Drums of Player-1 and Player-2 BOTH ( #1 and #2) Reset-Relays are involved. Also You will see that for stepping the Score-Drums of Player-3 and Player-4 BOTH ( #1 and #2) Reset-Relays are involved. In post-1 You write "... but Player-1 and Player-2 Score-Reels do not zero-out ..." - what exactly does happen ? Please toggle-off the pin, unplug the 110VAC plug (Safety Reasons) and step all the Score-Drums of Player-1 and Player-2 to "position one" - then plug-in, toggle-on, "start" a game - wait until no Score-Drum of Player-1 and -2 is stepped anymore - WHAT do the Score-Drums show ? (theoretical example 38610, 43720)

I am not familiar with Bally pins - look here (WILLIAMS) https://www.ipdb.org/files/415/Williams_1968_Cabaret_Instruction_Manual_no_schematics.pdf on page-15 (ori-13) on the bottom: Three switches do actuate --- in my JPG "green A, green B, green C" I show on Air Aces, tens-Score-Drum of Player-1 the three switches and also I show the colors of the wires soldered-on. Please take-out the tens-Score-Drum of Player-1 - try to locate these three switches - see how they operate (open / close) when You manually step the drum ?

See in the JPG "blue stuff and brown stuff" --- when the Score-Motor is running (trying to reset, to step the Score-Drums forward to position-zero) --- within a full revolution of the motor: #1-Score-Reset-Relay does rhythmically activate - deactivate - activate - deactivate etc. - 10 times in a full revolution of the motor --- and the #2-Score-Reset-Relay does this 12 times in a full revolution --- question: In Your pin do the #1- and #2-Reset-Relay rhythmically activate - deactivate - activate - deactivate etc. when Your pin does try to start / reset ?

Your answer in post-3 "... cannot test if the game-over-relay trips ..." is not an answer to what I asked You to do (my post-2) - Please WATCH the Game-Over-Relay while You toggle-on the main power switch - does the Game-Over-Relay actuate (while You toggle-on the main power switch) ? Greetings Rolf

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Hi Dylan
I would not lube stuff in the pin. I do not take apart Units until several tests I made tell me "must take apart and clean".
Fine - in post-6 You write "#1 and #2 Reset-Relays" do rhythmically activate and deactivate and so on while the motor is running.
I assume in the beginning of Your post-6 are the end-positions of the Score-Drums --- the drums of Player-4 are fully functioning - when checking switches on other drums refer to the switches / drums on Player-4.

See the JPG - I tried to visualize Your results - in the right bottom corner of the JPG: We stand behind the pin and look into the Backbox - I do not see a pattern in the results. Well on the Switches of #1-Reset-Relay the wire-30-Yellow does hop from one switch (a switchblade of the switch) to next switch to next switch to next switch, the same on #2-Reset-Relay-Switches - please inspect these switches - has wire-30-Yellow somewhere broken, broken-off the solder-lug so the rest of the switches not have connection to wire-30-Yellow ?

I had a look at Your video --- the Game-Over-Relay-TRIP-Coil is the one NOT having attached the Nylon-Ladder (the bottom coil in the video). I have the impression that the TRIP-Coil faulty gets always current - faulty activates all the time. In the JPG on the right I show the snippet of schematics for the Game-Over -TRIP-Coil - please inspect the Switch on the (steady pulling) Lock-Relay - truely open ? Please try: The pin is toggled-off - manually reset the Ball-Count-Unit - then toggle-on, start a game - what happens ?
(See in the JPG) A wire-Yellow-Black runs from one lug on the TRIP-Coil to "Switch mounted on the Game-Over-Relay" - have the pin toggled-off and manually latch and trip and latch and trip the relay - does this switch open when You trip - does the switch close when You latch ? Greetings Rolf

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