I just bought a 1990 Toyota 4x4 Xtra cab. The heater was hotwired to only blow on high and it was all busted from the previous owner. I went to the junyard and bought a new heater control unit. there are 4 cables that come to it and 4 places for them to go. But It wasnt intact when I got it and Im wondering if anyone can steer me in the right direction as to what goes where and how to get the dang thing back in the dash. Thanks!