If they do work off of a 30 minute relay, it isn't working. The delay from closing and locking the door is less than 5 minutes...normally. I watched as they turn on, with the truck locked, and stay on for over an hour. The confusing part is when I lightly rap on either the switch panel, or the panel directly to the lft, the lights go out (i;m in the truck and doors are shut). Nothing seems to be loose, nor associated with the light switch/dimmer panel. I have no idea where the timing circuit is and ask how that would explain the liughts coming on while I'm driving?