had a hot wire short out and now the car is overheating

Hello,

The radiator fan can be inoperative due to a bad relay, coolant temperature sensor or faulty wiring.

First check the relay. It is located in the under-hood fuse box (see diagram below).
Check for corrosion or burn pin(s).
This relay can also be tested for functionality:

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

If the relay is good, then check the coolant temperature sensor. That sensor is what send the signal to the ECM to turn on the fan.
The coolant temperature sensor is located on the side of the engine, between the battery and the engine (see diagram below).

https://www.2carpros.com/articles/symptoms-of-a-bad-coolant-temperature-sensor
https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

Please let me know if you have any questions.
Thank you.