Power Seat wires?/ Five wires to what?

[AlamoShooter]

I have replacment seats from a 2002 Excursion to go in my 99 F250 Lariat
The Replacment have five wires in the plug to my three.
I know at leas one is the seat heat = must be the big Red with Black stripe wire and the big Grean is a ground. Big Brown wire / yellow stripe =?
smaller blue & purple wire? must be the
seat belt wire small brown and blue = ?
I guess that the Seat heat will need a new fead and fuse to protect it but I just need ot conect the seat power the the right one
Thanks In advance
James