1997 4 cyl . Headlights either remain on or will come back on automaticaly when vehicle shut down. Dimmer relay in 1 fuse box and E/G Main in another rattle/buzz until engine started. Have replaced E/G Main. as it was the first to make noise, now dimmer relay buzzing as well,have to remove this one to turn off lights. Switch on steering collum appears to function, havent figured out how to dismantle and inspect yet. Problem is intermittent, when it malfuntions when driving lights go to high beam and can only be dimmed by shutting off using colum switch, leaving only daytime headlights. Lights don't always go out when engine shut down and remain on low power driving mode. If they do go out they may or may not come on within a few seconds. The buzzing of the relays is also intermittent, it almost sounds as if not enough power going thru relays to activate fully.