anyone know the internal wiring for a +3b. I wired it as was found on a few sites but it does not have audio. I have a 2510 and wired white to pin 1, red and shield to pin 2 and blue to pin 3. I think it may have been rewired inside. Pin 2 and 3 short when ptt depressed but 1 and 2 or connected untill you push the ptt. I think that should be the other way around because the stock mic is like that.