Two ways to test the fan module.
The first way is to start the car and turn on the AC most of the time the fans will kick on if you have the AC running.
The second way and it’s more fool proof. Take the battery and disconnect it. Pull the ecu out and reconnect the battery. Then turn the key to accessory. The fans should turn on with the ecu removed and the battery reconnected. If they don’t start up then turn the key to accessory and see if they start then. If they don’t start during either one then you might have a bad module. Most of the time if you have a bad relay you will get a code.