my highbeam portion of the headlight switch as been out for about a good two months now without a service light... just recently it has been going on whenever i start the car without the headlights or parking lights on... so if i start the car with the parking lights on.. and leave them on, no service light, but the second i turn them off completely... the light goes on most of the time... I'm pretty sure it's not the DRL's, because the DRL light on the cluster does not flash and set the service lgiht to turn on.....

BTW it's a 02 cav with cruise (DRL deactivated)