door locks are possesed

1996 olds achieva, the door locks unlock and lock automaticly by themself while going down the road. They will also unlock in the middle of the night, when knowingly the car was locked. Anyone got any ideas, or someone got a wiring diagram for the door locks. The book i got for it has wiring diagrams but not for the door locks, odd.

Im not positive the cars had them after 95 but 95 and prior they had a "Body control center" or sometimes called a "Convenience center" in the dash under the steering wheel, this is what controls the lighting and alarms among other things, and it also is what locks the doors automatically after you get in and drive away.. this is just a guess but if its not working correctly it possibly could make the locks operate by themselves randomly.