Where is the relay located for the dome lights on a 2001 ford taurus? What is it listed under?

WD40 does not always work and may not be the solution. While driving, my door ajar light and seat belt light came on. Opening and closing driver side door did not turn it off, but opening/closing passenger side door turned it off for a short time and then came back on. After parking the car, locking the doors, side lights and dome light were off - short while later,, they came on by themselves. Sprayed the latches several times with WD40 - no help - removed door panels and sprayed a ton of WD40 wherever I could and no help. I have to disconnect the battery. When I reconnect the battery the next day, I can drive for a while, but then the warning lights come on and the door locks cycle unlock/lock. I park the car, turn off ignition and leave set - an hour or two later, the dome and side lights come on. And yes, I removed the key when I turn off the ignition. Please answer with a solution not another question - either you know the answer or you do not.