Replacing Cooling Fan Motor Relay

If the fan motor fails to activate electrically check the cooling fan fuse and relay and replace as needed.

Replacing cooling fan motor relay.

The cooling fan relay is the relay that controls the engine s cooling fans. If you connect it straight to the battery it should turn on. When the fan is on too often or won t come on at all a new relay may be the solution. Testing circuit 87 and 30 step 14 when replacing a relay be sure to match up the terminal location from the old relay to to the new unit.

To inspect a cooling fan start with ignition key off. When the correct parameters are met a temperature switch or the computer will activate the relay which will allow power to the fans. The relay will usually be activated once it is detected that the vehicle s temperature approaches excessively high temperatures. The relay is hot because it s being switched on and electricity is running through it but it s not being drawing by the fan motor.

Testing the radiator cooling fan relay the cooling fan should be operating. The cooling fan relay is the relay that controls the engine s cooling fans. Disconnect connector and remove cooling fan relay. This is really an engine cooling fan relay but i can t find a wiring diagram for another fan relay.

There s an a c compressor clutch relay which is 44 in the same relay block which is powered by 10a a c fuse 30. Most commonly used connectors are a push type connector. Look for fan relay 45 in the underhood relay box. To test the cooling fan unplug the cooling fan and you ll need something to connect up the fan directly to the battery.

The cooling fan relay has an electrical connector that will need to be disconnected and switched over to the replacement cooling fan relay. Check both of those relays and. Compare the replacement cooling fan relay to the one being removed. Visually inspect the.

Without a working fan you could. Also there s fan fuse 20 which powers the relay. The relay controls when the fan turns on and off based on coolant temperature. Testing low and high speed cooling fan relays.

If your cooling fan runs all the time or not at all or if your engine runs hot it might be time to replace your cooling fan motor or relay.