Ford Edge Wiring Tail Lights
Camping World, Hamburg NY completed the wiring.
They incurred plenty of problems as they had not wired a unit with ditigal lights before
With Ford dealers assistance they resolved the problem.
I learned that E Trailer has a switch that simplifies the connection.
As for the use of the Edge battery for power they changed that by adding a line from the motorhome 12 volt to the edge.
Resistors were added to reduce the power required.
Zach at Camping World was a valuable resource.