1998 Blazer LS

The doors lock on their own, the back window went down on it's own while driving on the highway in the rain. definitely worse when it rains.
The doors will lock anytime so i have to make sure i don't leave the keys in the car. I did a visual inspection, checking for water infiltration and broken/pinched wires, bad connections and anything else i could think of to no avail. Any helpful suggestions are much appreciated.
p.s. vin 1gndt13w8w2147590