High/low speed fans

I have a 1996 Chrysler Intrepid with a 3.3L engine. The problem is that when I start it up the high speed fans turn on and stay on. I've changed the engine temperature sensor , checked the relays-they're ok.Can you help me out with this.:banghead:

Check the car for codes, if you get a code 35 then there is a problem with the Low Speed Fan Relay or the circuit driving it. If the PCM does not detect the Low Speed Fan Relay then it will energize the High Speed Fan Relay and run the fans at high speed to prevent an overheating condition.