Radiator Cooling Fan Motor: Description and Operation

Battery voltage is supplied to the Cooling Fan Relay by the RED (2) wire at all times and by the PNK/BLK (39) wire when the Ignition Switch is in RUN or START. When the Cooling Fan Switch closes at 107°C (225°F), circuit 37 is grounded and the Cooling Fan Relay energizes. Battery voltage is supplied across the Cooling Fan Motor and the Cooling Fan operates.