All-
I have figured it out and have my Prodigy brake controller installed. I used the Dk Green/White wire referenced above in the quote by harryj. I used a relay with a diode to prevent a voltage surge and it works perfectly with my Jayco popup. I just got home from my maiden voyage test drive and aside from some brake adjustments all is good.
I did take some photos, if there is enough interest I can do a brief writeup.
