ok i am trying to reconfigure my dash on my 59 i know what all the switches and knobs do save one what does the knob directly over the raido cutout do the one thats dead center i have vacume wipers so not thinking its for those since its some kind of electrical switch its a pullout one kinda like the headlights but i know where the headlight switch is "i am so confused lol"


1937 1/2 ton