First and most important, nice avatar, porkcarrot !!! Lee van Cleef is one of my favorite actors. Too bad he got so few good roles.

That area on your schematic fragment near the 3-5 ball adjustment is probably where you need to look but I'd need to see the whole schematic to be sure.

For a 5 ball game, this circuit is the difference between single and double bonus.

Pinball (resized).png

Switches looking like they're making contact isn't always enough. I've used the jumper wire with alligator clips method on hundreds of games.

When you say "bonus relay" do you actually mean the Bonus Score (Q) relay?

I'm pretty sure that for single bonus, the Bonus Score (Q) relay holds continuously until all the bonus is scored, and only then lets go. The same will be true for double bonus. For single bonus, 1000 will score for each 1/3 motor rotation. For double bonus, 2000 will score for each 1/3 motor rotation. The extra 1000 for double bonus scores through the circuit I highlighted in my post #3.

Do we need to talk on the phone?

Hi porkcarrot
I agree with @HowardR. When the pin scores 1000 points for each bonus then the L-Relay gets activated along "green line". When the pin scores 2000 points for each bonus then the L-Relay gets activated along "green line" AND sneaked in: At the same time along the "red line".
I crossed out "orange marked" --- this stuff has to do with the funny features "3 balls per play" --- "5 balls per play" --- see here http://www.ipdb.org/showpic.pl?id=2443&picno=48369 and here http://www.ipdb.org/showpic.pl?id=2443&picno=50362 .

I happen to NOT like to work on Score-Motor-Switches, Control-Bank-Relay-Switches, Interlock-Type-Relay-Switches. BEFORE I'd test Score-Motor-Switch-1B (in the red line): I would do a test telling me "Is the right side of red line good ?". I happen to have Jumper-Wires with an mounted switch in the Jumper-Wire --- I can toggle-off the pin (Safety Reasons), establish / clip-on at both sides my jumpering - the switch in the Jumper-Wire is open. I then toggle-on, start a game and at the time I WANT connection: I press the botton / close the "Switch in the Jumper-Wire". I like my Jumper-Wires with switches - I actually have "with push-and-let-go Button" as well as "with toggle-switch".

porkcarrot - want to do (?): Toggle-off the pin - locate the Adj-plug and the wire-color-yellow-black. Clip-on one Jumper-Wire and take the other end of the Jumper-Wire out into the open --- NOT touching metal. Take a second Jumper-Wire - clip-on at "Coil on L-Relay" and take the other end of the Jumper-Wire out into the open --- NOT touching metal.
Ask a friend for helping --- the friend does starting a game - playing - making bonus - then let drain the ball --- YOU hold one of the Jumper-Wires at the insulation in one hand --- and You hold the other Jumper-Wire at the insulation in the other hand --- at "Bonus-Count-Down": YOU hold together the two bare ends of the Jumper-Wires --- big question: Do You get TWO-thousands points per bonus stepped down ? (((You can do this on any ball as You are jumpering some switches)))
IF (if, if) "YES - 2000 points": The right side of "red line" is good --- further testing is needed on the "left side of red line".
IF (if, if) "NO - just the 1000 points": Further testing is needed.

I happen to have an nice JPG about Score-Motor Switches - see the second JPG. Greetings Rolf

0Super-Soccer-Work-01 (resized).jpg

0Super-Soccer-Score-Motor (resized).jpg

That's because the double bonus circuit is different between the 3 and 5 ball settings. You can see that in my post #3 above.

Try jumpering over the Motor 1B and CX switches. If it gives 5x bonus then the problem is with one of those switches or their wiring.

I had 5X bonus scoring when in 3 ball mode on the last ball on Top Score (which has the same bonus feature)and I discovered that the motor 1B switch was indeed staying closed.