Did some quick tests. Theory - the drivers door lock mechanism feeds back to the under dash control module when the security system is armed. If the drivers door mech does not tell the ctrl mod that the door is secure, the module repeatedly tries to activate the lock solenoids on all 5 doors. I would open the drivers door inside panel and use a meter to check it before ordering parts. I'll post results when I get around to that. Until then, I pulled the fuse so the solenoids don't wear out, and I'm open to any info that will confirm or debunk my theory.