Whelen 295HFS4 siren issue

[fedsig7]

Everything works on it, except the PA. Its connected, and doesn't look like there is any loose connections anywhere. Any ideas why this isn't working?

 

[philyumpshus]

Maybe the mic is bad. Most of the sirens I've seen in FD trucks, ambos, etc have bad mics. They don't get used around here anyways.

 

[JohnMarcson]

Pa volume is either turned down or the MIC is bad.

 

[Squad-6]

Bad mic is common due to them being thrown & depending on where it is mounted they get stepped on. The mic is also usually a magnet for every liquid ever spilled in that vehicle.