I haven’t read this entire thread but maybe it’s the actual switch that’s bad.

 

I don't think the switch is bad because when I press the button, two lamps under the front seats are still on. Only courtesy lamp is not working.

 

hi TungNguyen thank for the info. that you have provided i was planning to do the same for my car but was just waiting for someone to direct me in the right way so now correct me if i am wrong or missing something

I need following to change all the lights in my car to LED`s

3 -36mm for the courtesy lamp
2 -T10 for the reading light
4 -36mm for the license plate
2 - 36mm for the trunk
4 - 194 for the door