Hi all together, I have a Ford Sierra ’91 88kw DOHC Touring 170,000Km. The car does not drive great noises (chain rattles) and no permanent white in the exhaust gases. The porblem is that the radiator fans do not start. If the car is standing and running it gets quite normal warm, the indicator rises and is at some point on three quarters and the fans do not react. That’s why the car has already overcooked with an AU but nothing happened to me, engine was switched off before. I also have a new sensor installed with the 5 connectors which is on the front side under the suction socket. But it didn’t work either. Then tested the fans with bridge this plug. Only by leading the power I got it running (cable from battery to the negative poles of the plug) because nothing happens by normal bridge. What can I do or what is it because. MFG Sir Alex XXII