My system is the 5600 recently installed by a TN shop. I have a Garmin 400 WAAS (a 430 with no comms) that runs into the ARINC, I believe the 5600 also runs through there to the Trutrac Digiflight II AP. Currently the only GPS source visible anywhere on my system is GPS 1 which is the internal. To further complicate things the the auto pilot is seeing NONE of the NAV sources.

How do I get it all talking?

Thx