Interesting situation has devoloped. When I used the keypad or inside switch, I can unlock all the doors, BUT I cannot lock any of the doors using either keypad or inside rocker switch. I can manually lock them and the alarm arms. When I used the rocker switch inside to unlock, I hear the relay under the front seat clicking, but when I use the rocker switch to lock, I hear nothing. Maybe another relay has gone bad? Any ideas? (Its an 1985) Thanks

 

Something interesting happened. They just started working again. Out of the blue. Go figure!

 

It's the gremlins!