Radiator fan not working, 84 mustang svo turbo?
I had the same problem with mine when I got it, try turning on the AC or defroster, this should force it on.. if that doesn't work, Your AC system may be low on fluid and it is interconnected to the fan and can prevent it from working..
this is what I did....I put a bypass clip in the AC low pressure switch and then upplugged the compressor so it would not come on and be ruined..
Or you can just put a manual switch on the fan..
You can still drive it, just try to keep it over 25 mph, No idling around or long stops with the engine running.. and keep a eye on the temp gauge..