so my driver automatic seatbelt never moves, its always in the closed door position. im assuming the seatbelt system is tied into the door ajar sensor. i also notice that the open door light on the gauge cluster never turns on for the same side, and also dome light wont turn on when its supposed to when the same door is open. can a defective door ajar sensor cause it to never say when the door is open? if so, how much do they run for?