power locks unlock themselves
 

I drive an '01 mazda tribute. It's got power locks and recently they have started unlocking themselves.
It happens when I am driving...sometimes over and over. It never locks the doors only unlocking.
It's doing it now after I have locked up and left the car.
We disconnected the battery and left it off for well over an hour. We don't know what else to try.
ANY suggestions or advice will be greatly appreciated!'
~JD