Cooling Fan Relay Wiring

Primary cooling fan dual fans with dual relays single speed on off using ground switched devices only for primary activation using dual relays for two fans is not required.

Cooling fan relay wiring.

Remove the nut on the battery terminal and put the wire connector over the bolt and tighten the nut. However two relays will divide the load. The relay will usually be activated once it is detected that the vehicle s temperature approaches excessively high temperatures. The cooling fan relay is the relay that controls the engine s cooling fans.

The 12 volts comes from an ignition source the negative connection comes from the temperature sender which is designed to switch on at 185 degrees. A relay kit our part number ccfkrl will include everything you need to properly wire up your electric cooling fans with the exception of additional wiring needed to complete all of the circuits. You could use one relay. See all 8 photos.

The relay has four terminals one that is hot all the time even with the key off. Install a 10 gauge wire to the battery positive terminal with the use of a round electrical connector. Locate the relay in immediate proximity to the fan being used. Diy relay easy step by step electrical wiring fan example how to wire a relay how to wire a fan how to wire fog lamp how to wire a fuel pump relay variou.

And if a relay fails you will still have one fan running. The first part of the installation is to install the electric fan to your radiator and remove the mechanical fan. Electric fan relay wiring diagram wiring diagram is a simplified tolerable pictorial representation of an electrical circuit. Find a spot to secure the relay with a screw or a bolt.

It shows the components of the circuit as simplified shapes and the capability and signal contacts between the devices. A second terminal becomes hot only when the key is on. The fan uses a relay in the fuse relay box under the hood. When the correct parameters are met a temperature switch or the computer will activate the relay which will allow power to the fans.

By admin october 22 2017. To switch a relay on the two smaller wires make the connection from hot to ground. The positive wire coming from the electric fan will connect to one of two red wires on your relay while the negative wire needs to go to ground.