Hi Brian
thanks for post-100, good news. You say "also coin door coil activates" --- question: (only) with Jumper-Wires in use or "coin door coil activates when no Jumper-wire is used" ?
A while ago HowardR suggested the "safety pin (use) trick" - I tried it and the "safety pin trick" worked in my pinball machine. For this trick we need wires having fabric-insulation - when a wire has rubber / nylon / plastic insulation: It is hard to impossible to do the safety pin trick.
You have made the "A,B,C,D,E" tests having a Jumper-Wire clipped-on at 24VAC-10Amp-Fuse-Holder. Wire-red-black is soldered-on there. Question: Is the insulation on wire-red-black made of fabric ? or rubber / nylon / plastic ? I hope for "made of fabric". (Toggle-off, unplug the main power cord) Unclip the Jumper-Wire, take a safety pin - almost parallel to the running wire-red-black: Insert the tip of the safety pin through the fabric into the wire (push hard) so the tip of the safety pin gets into contact with the wire. Then clip-on the Jumper-Wire - on the safety pin. (Plug-in, toggle-on) Then do test "A" - the E-Relay-Coil fires (?) You have proven "Safety-Pin trick" works.
Now the real thing - the safety pin inserted in another place - see the JPG --- the safety-pin inserted somewhere into "my wire-orange is wire-maroon-green in the schematics is hopefully also wire-maroon-green in Your pinball-machine". See in the JPG the motor-switches on 1C, 1C, 1D, 2B - there is a wire (hopefully having fabric-insulation) connecting one blade/solderlug on each switch --- look for the best place to insert the tip of the safety-pin into this connecting wire. Then clip-on the Jumper-Wire at the safety-pin and to the tests "(A, B, C,) D, E" - big Question: Does the coil on E-Relay fire ?
When "Yes": fine.
When "No": Either motor-switch-2B is no good or the connecting wire "motor-2B to Anti-Cheat-Switch" is no good or Anti-Cheat-Switch is no good or connecting wire "Anti-Cheat-Switch to 24VAC-10Amp-Fuse (through Bounce-Switch)" is no good. Greetings Rolf