On Thursday, I attended a Clare County siren test at my favorite Vortex - the Freeman Township Hall Vortex. Unfortunately it failed, but the ambience of Air Horn coming from the Silver Lake Vortex was amazing! Just wish I hadn't shut down the camera by then. LKreykes also experienced a Clare failure, this time at a 4004 in city limits. It just wasn't the day for enthusiasts in Clare Co.
I honestly have no idea why the freeman siren doesn't work. The green status light is on, and I can get county radio signals at the siren. My guess is that the antenna for the radio doesn't work well or is disconnected.
Also, i've thought out the 2008 in Isabella Co some more. There is a 4004 at a FD across the street, which supposedly sounds for firecalls. Either the 4004 is ONLY used for fire calls and the 2008 is a tornado siren, or vice versa.