Where does this wire go?
 

I have found a wire that goes from the fusebox to the front of the radiator where it has been cut off. I am holding it in the picture below. Is this the electric fan wire? If so how come I don't have one?

a picture of my radiator
 

The picture below is showing my car's radiator as you can see there is no electronic fan there. Could this be because I don't have an AC?

What color are the wires inside of the insulating sheath? If the wires are one brown and one green then this would be the cable to the outside temp gauge probe.

You are very correct. The wires inside the insulation are brown and green. Where is the thing you are talking about is located? Does it affect the engine's performance?

The outside temp sensor is located near the license plate on the front bumper. It won't affect anything other than the outside temp reading in the instrument cluster (small window below the speedometer).

Are you saying the car is not equipped with AC, or it does but it is not working? The outside temp sensor has no bearing on the AC on your car, not the one that wire goes to.
It has no affect on engine performance either.

Gilly

Well, I would not drive without aux fan. It works always with AC but also suppose to start with a very engine temp. I really would install one. By the way, check if the fuse box has a fuse for the auxillary fan. If it does not, you probably do not need it.