How To Wire An Electric Radiator Fan Relay Temp Sensor AND Switch! | @WiringRescue

great vid! can I use a 4 pin relay?

excellent video

is it possible to make the relay turn on with a 12v positive? like if i tap power from my ac compressor wire/fuse to turn on the fan. that way when i am parked and no air is moving through the condenser, i can still get cold air by drawing air through it with the fan?

is there a way to contact you about some questions I have?

very good and excellent professional explanation thanks a lot my friend

Thank you for sharing this video in such a magnificent way…that’s a gift though …👌

Absolutely superbly made video, thanks a million, this video saved my face ✌️

Thank you! This was amazing to watch as I am trying to install a fan setup like this into my Jeep. Super helpful! And yes I have happily subscribed as well.

Good day to you does this diagram work on temperature switch that does have 2 pins ,all the best ftom Portugal .

Damn u good bro wel done keep it up

Would you run a thermostat around the same degrees as the fan kick in or would you have like a buffer between the two?

I installed an electric fan in my car to replace the old fan that cooled my AC condenser. Currently, the way it’s wired, the fan only comes on when the AC is on and when pressure sensor passes a threshold. I want it to also be turned on when my car reaches 87 degrees C. The old wiring from the old fan accomplished this. Could I use the old fan’s wiring to accomplish this? If so, would it just be the ground wire (because it already gets power from a relay).

Great video. I noticed my electric fan turns on when engine turns on. 85 relay goes to ground on car chasis but not connected to temp switch. I would like for electric fan to turn on only when engine gets to 200 degrees. Any suggestions would be appreciated. Thanks.

Would it be okay not to use a temp switch and just have it constant on when the ignition is on?

Will This work with a two pin sensor or needs to be a single pin?

Best video out there I think I’m a pro now thanks man!

What happens when you have ac on when you turn on t he key or truck on? Ac condenser will not get any air til the temp reaches certain temp?

Great job

hello , I have a Suburban 2012 and I want both fans working on high speed all the time no wire to radiator sensor by 4 relays type 5 pins and one fuse breaker 80 amper because my country is very hot would you show me the diagram thanks in advance

Outstanding way to simplify , this relays installation , on car Thanks , instructor 💯

Awesome, thanks

Many modern vehicles’ fan will keep running after the vehicle is turned off. Is that something to consider in wiring up an electric fan and if so, how?

good video....i was wondering if you can have a light to let you know the circuit is complete?

Can you run the ground for the fan to the negative post on the battery?

Thanks for sharing subscribed

one question can you put a water temperature gauge in this circuit or I need a different mount point

After a couple of minutes of the fan being on, my relay gets super hot, why could that be?

The gauge of wire used here differs along the circuit. Could you please tell me why and what you used?
For instance the red wire looks one gauge and the brown another for the grounds?

Good stuff..thx

After having my radiator fan bust up my radiator after breaking off its mount I am upgrading from a pulley fan to an electric fan while I replace my radiator and this was exactly what I needed to help make sure I had not missed anything when installing it. Amazing work, helping people out even a year later!

Great video but how do fans stay on after you turn of ignition ?

Thank for beautiful video 😊

You the man. Thanks

Thank you, I have wanted to know this for years!

Thank you for the video. Im trying to find out why the fan in my vehicle is not turning on. It works when I unplug the coolant sensor. I might have to test the sensor with a candle to so if its broken.

I sure enjoy the way layout your displays and explain everything with great detail. 👌👏👏

That ignition wire could also wire to accessories

I well understand the switching via earth/ground (85) but I almost never do that. I guess I started by just earthing the relay as that seemed easier. Switch via earthing is a good way. I just seem to always go the switched wire (86) to the load/fan/lights/horn etc. Either works and if one has a sensor that goes directly to earth it would be easier to got the earth wire way. Just wanted to say the switched power way works better in some cases. Bobby

AWESOME video. Thank you.


What is 87A for?

Hi, great video. I just did my camaro with a setup like this. But i would like to keep the fan running after the car ignition is turned off. Like a temp power delay shutoff for the fan to keep the fan running until it reaches a specific cool down temp and shuts off by itself qfter ignition is off and i walk away from the car.
Could you provide a video thats shows how to do that. As an option to your existing fan install video.

Thank you!!!

what if you want to drop the voltage of the fan because it draws to much power for your charging circut?

Man you are really the man

OUTSTANDING, CLEAR & TO THE POINT. GREAT A thru Z😊
You are now amongst my very few notifications.
Thanks, JS

Great demonstration, but I'm just curious why a 5 pin was used like this. If all the pins were used on a 5 pin then there would be less wiring and a simpler circuit.

hi is it ok to use a circuit breaker to operator a radiator fan or you have to use a fuse??

If I have the same sensor what temperature thermostat would you recommend

This video just saved my life! I was going crazy with this wiring! Thanks so much!

I had to drop a comment as this is such a well explained video nice easy and simple to understand this will definitely help me out big time especially as I am no good and electrics as they my weakest point