I opened up the dash on my 2012 Ford E-350 cutaway (with a Starcraft Allstar bus body) to replace the factory radio.
In addition to the wire harnesses (and vacuum lines) for the HVAC, 12v plugs, and wheelchair lift controller, I see these three unused wire harnesses (circled):
Close-up of the top (red circle):
Close-up of the bottom (blue circle):
The two harnesses at the bottom actually have dead sockets on the back of the trim to hold them and prevent them from rattling around, but there are no electrical connections:
All of these wires are part of the Ford wiring assembly, not part of the systems added later by Starcraft when they assembled the bus.
What are all of these wires for?