Yes, you can jumper the non-black wire of the 1000 point score unit coil to the non-black wire of the 10,000 point score unit coil. Then, actuate a 1000 point target on the playfield, and that should make both score units advance.

If the 10,000 score unit does not advance when you do this test, it could be that the score unit drive coil is OK but the score unit is mechanically broken in some way, and that is preventing it from advancing. On Bally EMs, sometimes the coil plunger breaks off from the nylon drive arm of the score unit, and that will cause a score unit to stop stepping. Or, the score unit could be gummed up or in some other way mechanically jammed.

In any event, since this particular score unit never moves (even during reset), it would probably be a good idea to check the mechanical action of the unit and confirm that you can you step it up manually, if you haven't already done that.

- TimMe

Great, glad you figured it out! The two ends of the very thin magnet wire used for winding the coil extend up from the coil, and are wrapped around the base of each solder lug on the coil bobbin. You may have had a detached magnet wire lead at one of the coil solder lugs, causing your coil to cut out. This happens more than you might think. These thin magnet wires can also fracture from time to time at the solder lug connection, causing a dead or intermittent coil.

Congrats on your first EM pingame! If you were able to clean up and (eventually) properly adjust all those out-of-whack switches in 4 or 5 days to get the game working again, I would say you definitely have a knack for working on the vintage games. I have a feeling your Big Show won't be alone for long!

- TimMe