The voltage on the sense wire to the stall warner switch from the module is not published as far as I know, but 10.6 volts doesn't seem bad. Vans support may know that technical detail specification.
There should be continuity between the switch "common" and "normally open" terminals when the vane is activated up.
The idea to take off the wing and place it upside down on some padded saw horses will make it easier to reach.
It will also help to have a large dental type inspection mirror and a LED work light to put inside.
Paul vS (yes I'm also a Van)
Building RV-6A #22320 O-320 FP. Wings and tail complete, fuselage almost done, working on canopy.
Flying my Aeroprakt A-22 STOL and the aero club's RV-9A while I build