Dave , it is pretty simple. Turn the fan on
and slide your hand back there , and see if it is blowing
foward or backward.
it should be pulling air back through the radiator....
if your really not sure. take the hood off.
put a paper towel over the front of the radiator.
when you turn the fan on. if it blows the paper towel off.
it is turning the wrong way. if it sucks the paper towel
to the radiator. you are good to go....