Back door eletrical noise in 2001 ford explorer while car is off?

My car has a weird electrical noise on the door/hatch of the truck. What could possibly be operating while the car is off, please help!

Wiper motor, locking solenoid Maybe the "door close" contact doesn't work correctly. Are you in an area that suffers from the Jan 2017 freeze? Ice in the door contacts may be a reason.

Maybe the "door close" contact doesn't work correctly. Are you in an area that suffers from the Jan 2017 freeze? Ice in the door contacts may be a reason.