Ford fog light switch wiring

[davrus]

Hi ya, i have a ford fog switch, poss a sierra. It is the one that puches in and the little light lights up in the middle of the button to tell you they are on.

Now my question is what wires go where

I have 4 terminals on it numbered 1,2,3,4 it also has a number 5 on it as well but no turminal coming out.

All help appreciated