Applied power to all the components and started configuration setup and checking connections and operations.
The GTR COM radio receives and transmits using either pilot or copilot headset. Right and left audio is correct. PTTs and discrete input 1 and 2 both work. The connections are all made to the GTR. I used test leads to connect the headsets, PTTs and discrete inputs. The audio connection to the GDU is working.
The GNX acquired enough satellites to determine position. Set up serial ports and ARINC ports and tried to test. Haven't finished testing.
GDU is still working. Continued setup for new components added. The GAD 29 doesn't seem to be recognized by the GDU even though the status LED on the GAD 29 indicates the CAN bus is connected with no errors. Maybe the GAD 29 connections are okay, but the GNX is not trying to connect over ARINC due to incomplete setup. The CAN bus between the GDU and GTR is working and I can see GTR frequency settings and transmit status on the GDU. I'm still trying to figure out how to use the configuration pages for all the Garmin components.
Printed labels and cut remaining wires for GMC 507. Terminated all wires except for the CAN bus.