Opening any locked door causes the latch to open and then close automatically within 5 seconds. If I grab the handle and open the door before the latch automatically closes I can enter the car. However, all of the latches in all of the doors continue to go up and down over and over again very rapidly, as if the vehicle is haunted by a ghost, until I close the door I opened, whereupon all of the latches lock in the down position. Any ideas about what is causing this happen?