Bought a WS-295 from someone on the board, installed it on one of my SAR team's vehicles. Lately it's been acting up. At first we thought it was the on/off switch, as sometimes the unit wouldn't turn on, but we're certain it's not that. What's happening is it'll turn on, and the manual button will light up. As soon as we key up the mic or hit the button, it will die out, and you might get like a half second of weak horn sound. Now we're thinking it might be the wiring for the mic, because it looks pretty haggard from the circuit board to the cord, so I'm guessing it's like that inside the cord too. I can't seem to replicate the problem though. It happened a few times when the mic cord was stretched, but then I spend the next five minutes stretching the cord in all directions and it worked fine. A few minutes later I wasn't even touching the mic and it started acting up again. Any ideas?