Q: How do you test and install a cooling fan on Honda CRX?
A: To check the cooling fan, turn the ignition switch to 'ON' position and on checking the thermo-switch, it should ground and therefore complete the circuit when the temperature of the engine is right. Check the wiring, the relay and the control unit and, if the thermo-switch is burnt or damaged, change it. Loosen the nut specified by the dot on both terminals of the cooling fan, turn the ignition switch to the 'ON' position, reconnect the cooling fan wire connector, then apply 12 volts to terminal A and ground terminal B of the connector indicated by the red arrow; if the cooling spins in any way other than smoothly and quietly, replace the cooling fan. For removal the negative battery cable should be disconnected, the cooling system should be drained and the upper hose if necessary should be removed. The fan motor wire connector must be disconnected by releasing two retaining clips seen from the rear of the hub, then the fan shroud attaching bolts are removed; after that, the fan and shroud as an assembly are removed while the fan and motor are taken off from the assembly of the shroud. For installation, screw the fan on the Radiator and tighten the mounting bolts to 7 ft lbs. The electrical lead should be reconnected, the upper hose connected and cooling system topped up if required, with each stage being performed 10 Nm at a minimum.