The newer icemakers look like this under the cover:
You must not try to turn the gear on this one, or it will be ruined! Instead, refer to the test holes on the front of the module. There is a diagram under most of the white plastic covers on the unit. Check voltage between L and N to verify voltage to unit. Jumper T to H carefully to see if the motor advances. If it does run while jumpered, the thermostat could be bad. If not, the module is bad.
Tip- For jumpering purposes, you can
leave your voltmeter leads inserted into the proper terminals (T & H), then
unplug the opposite ends from your meter and carefully touch them together.
Remember, there is voltage here, so be careful!