Hi osudrummer +
Great, You have a schema - I have taken the snippet You show in post-9 and show it with (added) Letters "A", "B" etc.
Look all over the schema , my "schema Far Out" tells me (near the drawing of the transformer): "Note: Circuit is shown with machine reset, ready for 1st player to shoot 1st ball AND LINE CORD UNPLUGGED".
I am sure (99%) Your schema also shows these "circumstances". Now, You want to play - Your pin is plugged-in, running, so the "Switch-A in my JPG" IS OTHER THAN DRAWN IN YOUR SCHEMA. Your "T-Tilt-Relay, my "B"" is not active, therefore the "Switch-"C"" is closed and the "H-Tilt-Hold-Relay - my "D"" is active , pulling, pulling, pulling constantly.
Lets assume You shake the pin a bit and make a "mild tilt" , "my Switch "E" closes -> "B" gets active, pulls -> "Switch-C" opens -> "H-Tilt-Hold-Relay "D" gets inactive AND "SWITCH-"A" changes position (now Switch-A is "as shown in the schema") - the "Self-Hold-(Part of)-Switch-A, Self-Hold-Circuitry for H-Tilt-Hold-Relay "D"" is open - the "T-Tilt-Relay "my B"" can get inactive (the pendulum tilt comes to a halt) -> "H-Tilt-Hold-Relay my "D"" stays inactive - until with a new ball -> "my Switch-"F"" again enables "H-Tilt-Hold-Relay my "D"" to pull and pull and pull ...
The "above written" is to make clear: You have started a game, You have a ball in the shooter lane, You want to play -> "my Switch-A" is "other than drawn in the schema". "Switch on SB2 - my "G"" is / should be "as drawn". "Switch on QB-Game-Over-Relay - my "H"" is / should be "as drawn".
Want to do a test with a "Jumper-Wire" ? - Would be more comfortable with two Juper-Wires having Gator-Clips ...
My description is for: Using two long wires (with insulation all around, but) - two inches of bare copper on all endings:
Turn-off the pin and unplug the Line-Cord ! Find the "Middle blade on my Switch-A***" and wrap one bare ending of "Jumper-Wire-Alpha" around the solder-lug having "Wire-color-Red-White" soldered-on (a solid wrapping around the lug). Carefully take the Jumper-Wire-Alpha with its other bare ending into the open.
Do the same with "Jumper-Wire-Beta": Find my "Switch-H***" on QB-Relay and wrap one ending around the solder-lug having "Wire-Color-Red-plus-White" soldered-on. Carefully take the Jumper-Wire-Beta with its other bare ending into the open.
Plug-in the Line-Cord, turn-on the pin, start a game -> after Reset -> hold Jumper-Wire-Alpha on its insulation, hold Jumper-Wire-Beta on its insulation -> and hold the bare endings together / make contact. Do the playfield features work ?
Switch-A***: A Make and Brake Switch, three blades, the middle blade has soldered-on: Wire-color-Red-White. An "outside blade has soldered-on: Wire-color-Red-Yellow. The other "outside blade has soldered-on: Wire-color-Yellow-plus-Green.
Switch-H***: A Switch with two blades. One blade has soldered-on: Wire-Red-plus-white. The other blade has soldered-on a blank Jumper (?) / a wire-color-Brown-White-Red (?).
Maybe want to look in the "list of Relays" in the schema -> (example) QB-Relay, 2A, 4B, 1C or such - this means (my example) QB-Relay has "2 Normally-Open Switches" - has "4 Normally-Closed Switches" - has "1 Make and Brake Switch".
Maybe You must look all over the schema and find all the "Switches on QB-Relay" -> looking at "color in schema" <-> "color-in the pin on the Switch-Stack" - You should jumper the "right" Switch on QB-Relay ...
Greetings Rolf zzzGtb-Duotron-pinside-JPG-04.jpg