Hey, first time at posting. I'm in the same boat as you PU Pink55.
But at a popup forum I found the following:
http://www.etrailer.com/bc-2008_Ford_Edge.htm
Click on the part the says "You need Item ETCB" it will take you to the 7 pin plug, and from there you can watch
a video talking about how to do the wiring you are asking about. Also general wiring diagrams on the site on how
to wire trailers and tow vehicles up.
If the link won't work C&P and do a new search at the site for
brake controller wiring.
Lots of good info there & here as well!
If Ya find something more on the line of a "plug & Play", post it please.
"Zoltar"