I've completed a build on a model 7 SS with a Rotax 912 ULS. For some reason, the G3x will not recognize my transponder GTX45R. The connections are sound, the harness was wired by Stein. Has anyone else had this problem? The ADAHRS (GSU25) is also not registering with the G3x, even though the green light is on on the back and it seems fine otherwise.

When I contacted Garmin, the asked me to recheck the wiring, which is fine. I'll call them again.

Brett
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Building Model 7 SS, Rotax 912ULS