'15 Coronado sleeper HVAC fan voltages?

2015 factory Coronado (not glider) sleeper fan has full 12.4 volts at the main constant power wire.
The two fuses in the pillar at the drivers seat are good. I pulled them for inspection and continuity testing.
The switch has 12.4 volts at two of the wires, that is testing across the wires, not using an external ground, so I assume one is grounding? The switch has resistance between poles, so as best as I know that is good?
But at the fan, other then the main constant power wire, no matter what I try, I can not get voltage at any other wire. Ignition on, dash fan works, but sleeper fan does not.
On the 4 wire plug at the fan, the big red wire is constant power. I assume the black is ground? But shouldn't there be voltage of some sort at either of the outside striped wires?

 

A very nice lady at Mahle tech support sent me this info to get started. She did not have the signal voltage range, but now I know the pin out.