Post 57 - Radio Issue

Another 7 hours of troubleshooting...RADIO PROBLEM SOLVED! Glasair 88 echo tango was able to communicate with the tower for the first time! Radio, headsets, everything sounded good. One wire from the NAV RS232 connector is unplugged, needs to be traced to the Dynon D180 for the VOR head. I'll do that soon. Had two trips to Crown Aviation for bench test and discussion. Still a little work to do but it shouldn't be difficult. Chasing this issue of 'COM Failure' on NAV/COM display since June.