checked a fridge the other day that has had intermittent performance from the icemaker recently. (last few months, runs for a few weeks, doesn't run for a couple months, ran a week . . . etc.
according to the wiring diagram I think that the B/W wire to white on the harness plug is supposed to be line voltage but I'm getting like 45 or 50 volts AC.
so this is my first mystery. who knows how many more layers of mystery once I figure out whats up with that but first things first , as they say.
( BTW - it does seem that the infrared eye that checks for the ice reservoir being full is working correctly according to the indicator light.)