I am integrating the GTN750s into the LR King Air C90B. Everything works except for one thing. The CDI needle does not show up in RNAV mode. It does show up in VLOC mode. The CDI button works in sync with the sim. I removed the GNS 530 and 430 but kept the Lua code so that I can "turn them on" before the GTN's. GTN's are now powered from the Avionics bus, as are the phantom GNSs.
1. Am I correct to assume that the GTNs need the original GNSs to be there in some way so that the AP can control the plane from it?
2. Do I have to enable support sim GPS commands for this to work? I actually have tried it both ways.
Additionally if I turn the GPS's on using DataRef Tool and cycle power to the GTN's the CDI indicator eventually does show up. I am attaching my ini file.
https://drive.google.com/file/d/18nSEDXXM4VGjULPnYrxhg0c0s0m0KpCU/view?usp=sharing