According to the schematic posted above (thanks renhanxue :)), navigation lights should not work without the main power on.
Also, cabin (flood ?) lights should work, but they don't. I'm not sure about FR24 radio, can't get it to work even with the power on.
Canopy works without power, as it should. :thumbup:
And yes, I am aware that this is terrible nitpicking and rivet counting. :D