Drivers door or others?
They are sealed units with a tiny LED in them. It's easier to just get a new switch,,, salvage yards or dealership. They just pop out, unswitch from harness and pop back in the new one.
I had one that would go on and off and was very weak. Put in a new one and the light is steady & bright.
You can use a small flat head screwdriver to pry it out of the panel, it'll come out. It's just held in with two bent clips that provide a tension on it so it doesn't pop out.
