OK - I am going to try something different here since I've done quite a bit of trouble shooting on this problem thus far. Here is a list of things I know about the problem:

1) Score motor runs endlessly when you turn the machine on.
2) restart button WILL start a new game and the start up sequence runs as it should - resetting the score reels, relay bank and making the playfield live.
3) Unplugging the Jones plugs - either - they run to the playfield from the cabinet will stop the score motor - I even think it might be the orange/slate wire and/or the white/red wire to the other plug - they spark when I try to plug the plugs back in and the motor turns back on.
4) The only thing NOT working as it should on the playfield is the "Add 5 bonus Yellow" roll over switch. It scores points but does not score 5 bonus units (Red bonus roll over does work correctly).
5) I found some wires that came off the yellow bonus kicker relay (on playfield) and one that came off the add 5 bonus yellow relay in the cabinet. That was exciting! Maybe this would fix the problem - but it did not. The score motor continues to run.

I still suspect the kick out relay or the yellow add 5 bonus relay, but the switches appear gaped correctly on both. I do have a schematic, but frankly, these Gottlieb ones are hard to read. I'm going to dig into that later today, but willing to try anything at this point to make the motor stop.

FYI - I did take apart the playfield and clean it - wax it. Also, as I found bent swtiches (I mean really messed up) I would put them back to the way they should be, so I don't have a really clear mental picture of what I may have adjusted to cause this problem.

Cheers,

Larry in Memphis

And because a picture is worth a thousand words - here's some photos of the Red/Yellow bonus I'm talking about and the Jones plugs with the wires that will STOP the score motor if I unplug them (orange/slate and white/red).

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Thanks - good plan for starting. FYI - I did not mention this, but I used online resources (Pinwikki and others) to install an on/off switch on the machine. I wired it up before the main slow blow fuse and transformer. May not be important, but since several relays ans switches were live when you plug the machine up I thought this was a good idea (and I was replacing the main plug anyway).

I have taken a photo of my schematic in the same section as the one you show - thanks for that. What don't know is where the SB switch is hiding. I think, based on the diagram key that maybe it is in the relay bank? That would suck.

Where was the one on the Lite a Card?

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UPDATE: I was able to access, clean and adjust switches on the relay bank. Some were REALLY messed up - like staying open when the relay was thrown or not. I cleaned each switch and all looks visually correct. Score motor still runs. Now it won't even go through the start up sequence, which is was doing before at least. So now it doesn't reset the relay bank even. Bad to worse in other words. Part of the process. Also noticed a piece came off the score motor - stop switch? Either way, I am going to keep hacking at it. Pretty sure the relay bank switches are not at least clean and operating the way they should.