dodge neon 2000 - door light trouble

i have a strange problem with my rear passager door.

my wife have closed the door over the belt and now when i close this rear doorthe interior car light is always open.

also , when i run over night , the door is closed and the light goes on and off like when a door is open.

i have try to see the wire from outside this door but i cannot pull out this little door control pin.

any help will be appreciate .

thanks

the fact is i cannot see where is this short electrical trouble from the outside.

i d'ont know where to  find a kind of shema or diagram on this vehicule electrical system.

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