98 378 Buzzer

Ok, I have the usual buzzer mounted behind the "B" panel for low air warnng and such, but I have a second one that's loose just dangling behind my "C" panel, and I'm not sure what it's for? But as of late, it's constantly going off, very low volume, but just enough so it's annoying the hell out of me. Any help would be appreciated.

 

I thought that as well, but the problem is, is that the beeper behind my dummy lights does all that, and this other alarm doesnt just beep like my warning buzzer, it's alwys on, but almost inaudible, the only time it is at full volume is when i first start the truck, then it stops, then starts its thing again, I really dont want to disconnect it, just trying to figure out what it's for

 

Thanks guys for your help, now I just have to figure out why it's doing what it's doing. now the fun wiring part kicks in.