Just started doing this a few days ago. Using remote or switch by driver window the front door and passenger side large basement door quit working on lock. Still works on unlock, also all others work on lock and unlock. Getting 12 Vdc on unlock but 0 Vdc on lock. Pulled the basement actuator and it functions ok with 12 Vdc applied. Since the entry door and basement door are doing the same I'm thinking it may be a relay. Any idea where to look for the relay?
Never mind. Find the relays behind the white panel in the driver side basement. Had a bad relay, changed out and working correctly now.