Somewhere near your fridg there should be a valve in the water supply line that feeds the ice maker. The valve may be below, beside, or behind the fridg but should be in fairly close proximity. That valve may be closed. Also, there should be a small electrically actuated "solenoid type" valve that opens to fill the ice maker when it demands water. That valve would be located in the ice maker water supply line on the rear of the fridg, inside the access door to the back of the fridg. That valve could be bad, disconnected, etc. Or... you may just have a bad ice maker.
'99 Diplomat 38A- "High Plains Drifter"
'02 Wrangler Tender