Garmin 430 transmit problem

I find that the co-pilot can not transmit on my Garmin 430. Pilot side is fine. Garmin 340 Audio Panel Intercom is fine. PTT works. Switching headsets has no effect. 'Static' is transmitted but no voice. Any ideas how to fix this?

Thanks in advance,

Roy

Check the co pilot mic jack to 340 pins.
That would be Connector J2, Pins 32 & 34.
Diagram here.
http://aviation.vortex.is/install/Garmin%20Install%20manuals/GMA-340.pdf
Enjoy.

Problem solved

I had made a mistake in connecting the PTT switches to the Headset plugs.

Thanks for the help.

Roy