Courtesy lights and chime
 

When i open my doors the courtesy lights doesnt come on unless i hit the unlock button on the remote or i take the key out of the ignition. The Chime never sounds either when i start up the car. Since i got the car the drivers door would never turn on the courtesy light or the red light on the actual door. Now this week the passenger side is doing the same. So if i use my remote to unlock the doors if i dont turn on the car within some seconds the car automatically locks and arms the alarm again. Where is the sensor that tells the car that the door is open? Help Please