February 10, 2021 – I fixed my #2 com control head!
I replaced a solder sleeve under the panel where I had power running from the VPX to 3 wires, 2 of which went to the #2 com radio, and one went to the control head in the panel.
Since the hangar was empty, I rolled it outside so I could get a GPS fix. It worked great!
I turned the airplane roughly north and the HSI followed suit. The map even showed some traffic!
Sounds simple, but I’m amazed I wired this and it works!