Ambient Air Sensor.
 

The info bar on the roof of my 99 grand cherrokee says open circut, i'm not sure where the sensor goes, and didn't know if the ambient air sensor would fix that so my car could tell the temperature again, i crashed my car over the winter and had to get a different bumper from the junk yard and thats when it started to not tell the temperature anymore. Any pics or something to help show where the sensor goes?

the sensor is behind the stock bumper. not exactly sure where on a WJ.