The Temperature here in florida reached triple digits this august. I installed this 10 inch fan, that helped significantly with the a/c and radiator cooling. I wired a fuse and a relay so the fan works only when the key is in the ON position and when the TOW switch is engaged. I also mounted a lighted switch, RED light = fan is off, GREEN light = fan is on and running. When the key is removed, all power to the fan stops.