Anyone have any ideas on how to diagnose a avionics problem that just happened. My D-180 and AP74 is no longer receiving input from my Garmin GPS-495, thus no Wind Aloft, nor Nav Autopilot, etc. I did swap out my 495 on another 2010 RV-12 and it worked fine, so the issue is Van's control board or the D-180. I did check all wiring for chaffing and the connectors, and found no issue. Called Van and Dynon and they had no tangible ideas, except upgrading which seems like over-kill. I am thinking of direct wiring the 495 to the 180, bypassing control board.... My bird has 500 trouble free hours on it up to now...