So fuse 4 engine side keep is blowing…   It’s appears to control:   Radiator fan,   control valve for fuel pressure,   relay for electric auxiliary heater   Bit when it blows, it’s takes out the oil temp sensor (oil sensor: workshop! On dash) And the turbo…… so it must controls more, but I can’t find what else!   As I said on another thread (this one is more fuse 4 function specific), a guy cleaned a sensor under the engine whcih I