90 ford 4wd pushbutton

I need to know the wiring diagram for the electric 4x4 engagement. There are two buttons one hi and one low. They have eight prongs that
connect to the back. I need to know the color combination. The bracket holding the pigtail broke. Any help would be greatly appriciated. If anyone know of replacement parts for this unit that would be great also.
p.s. Check out this stuff before it snows