Last Ford I worked on, the Controller Circuit was ALWAYS HOT and the way I ran the wiring, I blew the underhood fuse. Do you have a diagram of your Fuse Box(es)? You could probe the two connectors with an "ice pick" test light (other end of tester has a wire you connect to ground). Then eliminate a connection by seeing which works with the fuse IN and not when it's OUT.
For some reason, I keep thinking you need the GRAY connector, but I don't blame you for checking.
In addition to the Flasher suggestion, I'd add: Replace Braking Fuse(s) with Breaker(s).
