I looked at a friend's SS last night. The 10 point relay keeps cycling because the coil is not being activated. This is for player 1 and player 2, same issue for both. If I manually trip the coil, the relay stops cycling. Anyone know what relay is supposed to fire the coil, or any other ideas?

I do have schematics.
As long as the 10s units are at zeros, the game will reset ok and put a ball in play. Everything works ok until a 10 point switch (slingshots) are hit. So basically when the 10s coil for player 1 or 2 is supposed to active, it doesn't and the 00-90 relay keeps cycling until it get a signal back that it did.
If I use my finger to press in the plunger (manually trip it) the digit rolls to the next number (or all the way to zero upon game reset) and all is fine.

Briehl - I haven't ohm the coil because it happening on both player 1 and 2. Could they both be bad, I guess so.

Update. The 10 are now working. It was two fold. There is a jumper wire from player 1 to player 2. That was a bad solder joint. Re flowed and player 2 was fine. Then found that the wire that comes out of the coil and attaches to the lug had come off. Resolder that and player one was working.
Of course in the mean time the 100s coil for both player 1 and 2 stopped working. Didn't have time to look further last night, but hoping it may be same sort or issue.
So they can at least play the game, but the 100s don't score. Hopefully I can get back there soon and take a look.