1991 Century Electrical Problems

I am still looking for advice on my electrical "ghost" for my 1991 Buick Century. Interior lights come on by themselves and will not turn off, door locks cycling by themselves, I removed fusebox and checked for obvious problems, none found. I had to unplug remote trunk switch to remove fuse box, now I'm finding trunk lid open after a few hours (remember push button in glove box is disconnected) also I'm finding doors unlocked after I have locked them. Please throw any ideas my way!! THANKS