Hi Ivan - I have a copy of the wiring diagram for the Bargeman 7 pin
connector that Gerald J. referred to. Email me off list if you would like it
sent to you.
As far as the brake controller goes, I have a Prodigy and have been very
happy with it. Mind you, I have never towed before so that is my one and
only benchmark. I still love it nonetheless and feel confident in referring
it to anyone.
FF