I usually do this step by step with people, but I will give you this all in one. If you run into problem, please ask.
OK. Here's how you do this.
Warm up your car to operating temp (195deg)
Wait for your car to start overheating. (200+)
You must do this while the car is running and when fan should be on and isn't. Engine will be hot so be careful. Also, don;t let the car get too hot, keep the gage out of the red zone.
Check for power at the radiator fan motor for 12V. (red wire) If you have power, you have a bad motor.
If no power check power at relay. Remove the relay and see if you have 12V at terminal 1.
Got power, good. If not, check fuse 33 and 35 in under hood fuse box.
Check for power at terminal 3 for 12V. Got power, good. No power, check #13 fuse in dash fuse box.
Jump terminal 1 &2 with a suitable wire, paper clip, or anything that's metal. Fan should start.
remove jumper and Reinstall relay. Disconnect the temp switch. Engine coolant temperature (ECT) sensor. Jump the yellow/green to black wires together through the plug. if it fan turns on Replace the temp sensor.
If all fails, swap the radiator fan relay with the condenser fan relay and see if the fan works. If it does, you have a bad relay. If not, you have a wiring problem or a bad pcm.
If you have any questions, please let me know. Let me know with what you find.