The one siren I staged to video did not operate!!!
The (completely?) solar-powered Whelen 3016 at I-225 and Mississippi failed to sound.
Aurora Fire Dept. truck #8 was parked in the Best Buy parking lot to monitor the siren.
Siren is north side of Mississippi, east side of I-225 (in center of aerial photo.)
http://maps.live.com/default.aspx?v=2&c ... &encType=1
When the other sirens began their "Whoop" ALL CLEAR signal, it briefly "burped" a sound. The horn also very slightly turned right 2 degrees.
Dead batteries?