Try jumping the thermoswitch with a paperclip. The switch, which looks like a plug) is located at the thermostat housing. This should be towards the right-side/right-rear portion of the engine (passenger side). Turn the car on and if the fan runs, then you need to replace that switch. If it still doesn't, you need to look at replacing the relay. Also check to see if the fuse, No. 57, is good.