Pin 1 - Ground
Pin 2 - Microphone
Pin 3 - PTT
Wire the ground side of the microphone element (one with connector fingers touching metal case of element) and one side of the PTT switch to Pin 1. Other side of mic to Pin 2, other side of PTT switch to Pin 3.?
This is the ¡°conventional¡± wiring for 4-pin microphone plugs (and would accept a Cobra CB microphone). Make sure that your chassis connector is wired to match. ?
