Ambient Temperature Sensor
WARNING: This page is about a different car, the 1999 Lincoln Navigator and 1999 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
Sensor contains a thermistor (temperature sensitive resistor), which measures outside air temperature and inputs signal to EATC module. Ambient air temperature sensor is located in front of condenser, on radiator support near center of vehicle.