Randomly I will turn on my 96 Taurus GL Durotec and the light will be on saying there's a door ajar, when all the doors are closed. The overhead light and floor lights will stay on, even while I'm driving. I've tried opening and closing all the doors and trunk, and shutting off and restarting the car. Nothing works. Then randomly the sensor will shut off and the lights will go off. There seems to be no rhyme or reason to it. Is this a sensor that I need to replace? Any other suggestions?