Smart Car Radiator Fan Relay

If the car is hot the thermostat will switch on sending that 12 volts to one side of the relay coil.

Smart car radiator fan relay.

The cooling fan relay is the relay that controls the engine s cooling fans. Most cooling fans use electric motors that have a moderate to high current draw and as a result are commonly controlled using relays. What do the relays power. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool.

If it is a on off sensor you can use it for your second rad fan or use the output to the existing fan to drive a relay and your add on. When installing an auxiliary fan or simply wiring the factory fan so that the driver can manually turn the fan on and off make sure the fan is turning in the right direction. This shows the single relay on the back of pcb 3 and there are 2 relays over on pcb 4. Dual electric engine cooling fan wiring harness 185 165 thermostat 40a.

The cooling fan relay takes the low voltage signal and internally switches the relay on to allow battery voltage to be supplied to the radiator cooling fan. Basically this circuit uses the very low impedance of the starter solenoid to provide a ground to the relay coil. How to wire a relay for a radiator fan by don bowman. By using a lower voltage signal to control the relay there is less stress on the rest of the wiring and charging system.

When the correct parameters are met a temperature switch or. If the fan is not turning in the right direction air will be blown away from the radiator and will not help to. Evilution the smart car encyclopaedia full of information for fixing and modifying your smart car. Electric cooling radiator fan accessory w mounting feet car modification fan kit.

Truck rv car modification fan parts eelectric cooling radiator fan accessories. Work in progress. Radiator cooling fan motor assembly fits smart fortwo 2008 2015. It is a 25a fuse.