battery drains and doors are locking themself when car is parked

you have a short in the wire harness. could be a broken wire that ground the locking switch.connect an amp meter to battery pos terminal to see if there is an amp draw when park.try shaking wire harness to see if the door locks.find in the owners manual which fuse and relay supply 12 v to that circuit remove relay.leave to see if it still drains the bat (2)trace back wiring to door switch (3)disconnect wire harness from lock switch .see if it still drains bat.if it did not lock while shaking wires.and the fuse is in tact it cuold be your relay.this is my best idea.i am not there but it sounds like a relay or the door locking module