Trying to find out how to change a brake light switch on ford econoline e350?

look underneath at the brake pedal, now find the wires connected to it.you may have 2 switches,1 a white button.leave that 1 alone.get the other, it might have a hairpin in it,pull it, remembering to replace all those bushings back in.(style might be different these days, been awhile)Trying to find out how to change a brake light switch on ford econoline e350?18.00 thru 25.00.