Two Player Shuffle Alley Express is the game.
I mistakenly bought the one player schematic and even that was hard to find.
My symptom is that Player 2 does not get credit for Strikes or Spares, but does get credit for any 1 to 9 pin counts. Player 1 works properly.
The Change Over Relay is operating as it should. The contacts are clean, aligned, and gapped.
When I measure voltage from ground to the center contact of each of the two switch stacks on the Change Over Relay, I get something like 8V on one and 0V on the other. When the Change Over Relay is later actuated, both go to 0V. My guess is that either they should have swapped, or the 8V should never have fallen out. And if I knew, I am not sure I know where to look.
Any ideas?