Haunted Truck on 1998 Ford Explorer

Battery is dead on the truck each morning. My son finally noticed that the power locks are clicking over and over agin when it is parked. Also main fuse blows.
I suspect there is a sticking switch (drivers lock switch doesn't work) or a bad coomputer. It is not a stuck button on a fob.
Has anyone seen or fixed this before?

Asked by for the 1998 Ford Explorer
I had similar problem with my brother in law's Explorer. The door panel on the door that you hear the door lock solenoid needs to be removed, disconnect the door lock solenoid and with an amp meter in the circuit see if the parasitic draw goes away, if it does the solenoid is bad, I think it came with the door lock/latch assembly, which wear out.