I dont want to sound like a smart ****, but i am guessing you have checked the bulb yeah ?? and also the actual switch make sure its not set to off but to door ?? have you check with a multimeter ?? if not before pulling your car apart, get out your multi meter (or buy a cheap one from supercheap or dicksmith) and see if the terminals are live, and maybe check the switches. also check at the fuse, check those 3 spots and that should help locate the break thats my thinking anyway. I think my manual at has a wiring diagram, ill see if i can find it