Hello, look on the radiator must carry a thermocoury, it is a ruptor that connects (current passes) when the temperature is more or less between 87 and 95 degrees and disconnects when it falls from that temperature (it does not pass current) is a round piece of plastic with a metal hexagon where the key is inserted to replace or put it new You find in the old cars were only two cables that when disconnected the two cables stopped the radiator and Se os Unias, o ventilador funcionou, mas hoje os carros carregam muito carro para ver onde o Radiator Reliat certamente está preso e você terá que substituí -lo igualmente.