Installing new brake controller
Yes the activator is a 4 wire connection as is the Prodigy. It should be quite simple.
I picked up this from one of these forum posts - no guarantees implied.
Tekonsha - Prodigy Wiring to a Ford harness
Harness . Prodigy . Location
------------..-----------..------------------------------------------
Red.......black......positive battery
white.....white......negative battery
green.....red.........turn on from cold side of brake light switch
blue.......blue.......output to trailer brakes
brown ... (not used, for illumination for some controllers - tape off end)