Cooling system Fan on my 47 Deluxe

[qickkenny]

I have a 47 Deluxe convertible with a cooling fan that does not seem to be working. I was told this weekend it should have a wire going into the lower radiator hose to a temp sensor. It has one wire coming out of the back of the fan bracket and nothing else. I looked in my shop manual, and the only fan that was showed was one with 90 weight gear oil in it, not like mine. any help would be much appreciated.