I am helping a friend with a Hi Lo Ace. We haven't been able to get the score motor to run at all. I'll try to list what we have checked so far.

New fuse, double checked continuity
Power from transformer is getting from there to the motor.
The index motor? runs continually if I manually activate the credit relay
I am using a schematic from a Fore and it "looks like" any one of the outhole, 500, 5000, reset, etc. relays closing should start the score motor to run. None of them have any effect.
I put power directly to the motor from the fuse. It still didn't work but since it has power to the motor I wasn't too surprised by that.

One thing I can't really figure out on my own is that both motors seem to always have power. What gets them to run if they always have power?
If anyone has any suggestions on any ways to check the score motor, I would really appreciate it. I have machine in front of me, if I can get you more info.

EDIT: We got the score motor running but it seems to be stopping early. I posted pictures below.

This will be so much help. Thanks so much. I'll post any results I get.

Thanks Chrisbee! I jumped them and the score motor runs.

That is a relief. Now I just have to find the cause. I'll work back from there, looking for a problem with the wiring and solder joints. My biggest concern was that the motor had a problem. Thanks again.

EDIT: With that out of the way we started making real progress. Even got to flip the flippers at a pinball!

Both wires.

20140814_175203.jpgWe got the score motor to run but we have another problem. It looks like the score motor is stopping early. You can see in the picture where it is stopping.
I would really appreciate any help. I told my friend I would help him get it running but I am moving in a week and he in getting nervous!
Thanks again.

That is great Chrisbee! Especially this bit:

Thanks a lot for all of your help. I know my friend appreciates it too. The clock is ticking on this and I would feel terrible if we didn't get this running before I leave. As always, I'll post any progress...

20140818_122519.jpg On the schematic it shows a open/closed switch at the 3rd coin chute. On Jim's game the switch is this style. Is this correct?

20140820_101551.jpg
So, I am having a problem with this machine that I am not sure what to do. When I put a coin through the slot the start up procedure begins as it should with the exception of the score motor not starting. There is a switch on the coin relay and the reset relay that are closed that should start the score motor. Neither one does.
The 500 and 5000 relays will start the score motor as they should. I would love to help get this thing figured out for Jim but I am at a loss right now. Not sure what would keep the score motor from starting, looking at the schematic. We would both really appreciate any ideas at this point. I have checked all of the switches in this area of the circuit and all seem to be adjusted correctly.

IMG_20140820_104103.jpg
Start up is working with the exception of the score motor stopping.

Do you mean the switch that would normally stop the score motor at its home position? If so, that it's the top switch on the first cam. It has been cleaned and I checked that it opens and closes correctly.
As for being tinkered with, it is likely just a bad angle. They are dirty but not mangled.