Thanks, Mick. I should have been more thorough in my description of the problem. The switches are working OK. The solenoids that move the lock shafts up and down make noise, but nothing happens. It's as if they were dragging on something. I've tried enlarging the holes in the tops of the door panels, but there's really no effect from that. Lubrication didn't make any difference. And lubrication needs to be done very carefully due to Arizona's legendary dust. Well, maybe not legendary but certainly annoying.
Matt in (you guessed it) Arizona