Cooling fan won't come on?

Hello,

Fan can be inoperative for typically three reasons, the relay, temperature sensor or the fan motor.
Since you have already done the relay, next step is to check the temperature sensor.
If the sensor is faulty it will not send proper signal to trigger the fan.

Also you want to make sure you are getting power to the fan.
As well as power to the relay, just in case there is a wiring issue.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

https://www.2carpros.com/articles/how-an-electric-cooling-fan-works

I have attached the wiring diagram for your reference.

Please let me know of any questions.

Thank you.