Radiator fan doesn't come on. I replaced the sensor. I took the cover off the 50 amp relay and it's working. I hotwired the radiator fan to be sure the motor wasn't out and it works. Any ideas what to do next? Also the air conditioner started blowing warm when the car gets hot.

 

If you have a copy of the owner's manual,
Look in there and it will show you which fuse and relay controls what.
Usually the cooling fan(s) come on whenever the A/C function is selected and engine running Does it, do they?