1990 Engine fan HELP!!!!

[COLOR=darkred][FONT=tahoma][SIZE=7]I have a 1990 Toyota Camry and the problem is the engine fan. The wierd thing is that when I am driving the car or the engine is on, the fan cycles on and off properly. However, when I turn the car off, the engine fans turn on and the fans will not shut off. I changed both of the 30amp fuses, but no luck. When I shut the car off to save the battery, I pull out the fuse and the 15v relay. I have yet to change to relay, but what can be causing this problem? If I have the engine off and the relay and fuse out, naturally the fans don't work. If I plug in the fuse, even with the relay out, and the engine off, one of the fans will go on. Any answer to the car with a life of it's own? [COLOR=dimgray]

A malfunctioning relay may still bee feeding power to your fan, in accordance with the temperature sensor.

You will need to refer to a wiring diagram to troubleshoot the problem.

In addition, you might want to also clean the temp sensor.