hi I was given a Valley electric brake controller
it works and best yet it is FREE
question is the controller has a blue wire red wire white wire and a black wire

my harnes plug for the truck is green-stop lamp---red-feed wire----
white-ground-------blue-to electric trailer brake
brown-illumination feed----

question is what wires do i splice my trailer brake controller to my ford wire harness
since the controller hasnt got any directions and was removed due to the other truck being sold
any info would be great