Max 25A load 40A Fuse (the silver colored box with two connections) 40A Relay (connected like a normal relay) The thread to the sensor is standard 3/8Npt Connection Relay: 30= constant current 87= to the fan 85= To the temp sensor (the sensor must be grounded) 86= constant current (then the fan runs even when the car is switched off and the engine temperature usually rises) There is also a cable lug on the sensor cable, which can be connected to a switch and then to ground (0m you want to be able to run the fan manually)
