post lantern sensor?

Forums: 

Has anyone had to replace the sensor for the post lantern in front of our townhouses? Mine is not working and I replaced the bulb, but it is still not working. I don't think the light fixture itself is bad, I am suspecting that the sensor that turns it on at dark is not working. If anyone has had to replace that, can you provide some tips? Is the sensor located in the small electrical box near the driveway with the black round thing protruding out of the middle of the box? Thanks, Scott