1997 Chevy Venture Van with auto sliding side door.
My door locks constantly lock and unlock when my engine is running.

My automatic doors locks did not work for a long time after I had my transmission torque converter replaced.

Now a few weeks ago, after a rain, my auto door locks work, but keep going off and on. The windshield wipers were doing the same, but have stopped doing this.

I tried drying out under the dash with a hair dryer, but no luck so far.
All the fuses are good in the fuse box.

When I open the door, the sound for keys in the ignition goes off, without keys in the ign., until I turn the engine on.

Where to check for short?

 

Have you had anyone check the body control module. Sounds like the problem may lie there, since its just body functions acting up.