Here's the main control board for your model:
Control Board WPW10589837
Its located in the back of the refrigerator, this video gives u the general idea of where its at:
Service Test - 58 Ice Maker Heater Activation and Thermistor
• Press SW3 to activate the Ice Maker Heater and to toggle between On and Off. Digit 1 displays the state of the heater. Digit 2 displays the thermistor state.
Digit 1 0 = IM Heater OFF, 1 = IM Heater ON
Digit 2 0 = Temp warmer than harvest temp, 1 = Temp cooler than harvest temp, 2 = Open, 3 = Short
At connector P12 on your main control board P12 pin 6 to P1 pin 2 should be 115 Volts.
Service Test - 59 Ice Maker Motor
• Press SW3 to activate a Motor sequence and toggle through each step. Digit 1 displays the state of the motor. Digit 2 displays the status of the motor. Once initiated, the sequence cannot be exited.
Digit 1 0 = Motor OFF, 1 = Motor Rotating CW until home position, 2 = Motor OFF, 3 = Motor Rotating CCW until home position
Digit 2 0 = In Progress, 1 = Harvesting Completed, 2 = Harvesting Not Completed
NOTE: Harvesting Not Completed does not exit the step, but indicates the timeout of 70 seconds has passed.