I'm working on a Stern Stampede EM machine. I've gotten most of it working as it should, but can not get the ball count to increment. I have traced back every switch in the chain, and it seems the score motor isn't turning from the out hole relay. The score motor will move slightly, but won't move forward even one position. Occasionally it will work. Obviously something needs adjusting, but I can't figure out what. The score motor works fine when it's triggered elsewhere. So it's not the motor run switch. Any insight is greatly appreciated!

Yes, it has. It looks like the motor wiggles but doesn't start a rotation when it triggers. If something else triggers the motor it works as normal. I have tried adjusting the switch, is it possible it's making the connection too quickly and not engaging long enough to start the motor cycle?

Drops out immediately it seems. Pulses for less than a second.

Found my problem! It was switch E3 on the motor, "Outhole Relay Lock". I had cleaned it, but it apparently needed some major adjustment in the space between blades. Seems to work fairly consistently now. Thanks for the help, your suggestions definitely sent me down the right path.