You can now buy just the terminal from Ford. It is an easy install. Here is the part number:
You just disconnect any of the wires from the terminal, pull the 3 amp fuse and then disconnect the wire that comes into the bottom of the terminal box that connects to the fuse. There is a little...
when you set the rear pods to speaker/tweeter did you also turn if the factory EQ in forscan? If not, trying turning that off is Forscan and see if that helps.