Whirlpool Ice Dispenser DC Voltage Source

Ice dispenser motor doesn’t turn when dispenser is depressed. Checked for AC and DC voltages at the motor. I have AC, but no DC (on either side). I replaced the front door switch plate, but that didn’t fix the problem. Where is the source of the DC voltage for the motor? The switch plate does not contain the AC to DC converter. All the switches work, including the dispenser switch.