My driver door won't shut off the radio and turn on the interior lights on 2005 Dodge Magnum

Driver door won't shut off radio and turn on interior lights and kills my battery the door ajar light doesn't turn on in the dash unit but all the passenger doors and hatch will read on the dash unit I think it's the lock mechanism sensor that isn't reading if you have had this problem and know how to help it would be greatly appreciated

2 answers 2 comments
poss door ajar switch is bad
How hard is that to fix? And is that located in the lock mechanism?
This should shed some light on it for you: http://dodgeforum.com/forum/3rd-gen-ram-tech/133127-driver-door-light-switch.html
Agree, probably thd door ajar switch is bad.