On my fridge I must remove two items before the ice makers on/off switch is visible.
First Remove the ice bin, then remove the panel that the ice bin attaches to (no tools required, just jiggle them out).
If necessary toggle the on/off switch on AND ensure the bail is in the lower position.
The bail will rise as ice is made and once the ice bin is full it'll be pushed up - turning off the water supply (so as to not flood it).