The N relay should lock in when any 10 point switch on playfield closes, energizing 10 pt score reel and releasing when reel EOS opens.

Does the game have chimes installed? Could be that 10 point chime coil is shorted. That would explain why the score reel works during reset but not during scoring.

Also match unit may operate via the N relay - check match unit coil too.

This is 100% broken behavior. You need the EOS switch on the score unit to open every single time it steps, or you'll just keep frying coils and blowing fuses.

The three main reasons this happens on a score unit stepper is:

- The EOS switch blades are either out of adjustment, or the top of the long blade has broken off.
- The coil stop has come loose inside the coil sleeve and is blocking the full travel of the plunger.
- The plastic coil sleeve has deformed from overheating and is blocking the full travel of the plunger.

There could be some other mechanical issue with the 10 point score unit that would cause this problem, but the above are the most common.

- TimMe

There isn’t enough power for the coil due to a short somewhere else robbing the necessary volts. Think of everything that occurs when you trigger a ten point switch on the playfield. Chimes and match function like mentioned above. Does it also have an alternator relay? Disconnect the power to those (put paper in the switches that power them) and see if the problem goes away.