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Cabin lights not lid when door opened

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I'm talking about the incandescent light bulbs in the overhead reading lights, and the clear/red lights in the door (to warn rear approaching cars the door is open). Basically all the interior lights not lid when I opened my door. I have checked my fuse box and all fuses seem not blown. But I can turn on the overhead reading lights manually. I suspect could be one a relay switch control the lights is faulty. Can anyone kind enough to tell me the relay switch location inside my Porsche 996 cabriolet (2004 model). Thank you folks.

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I don't have a 2004 wiring diagram but suspect it's the same as my 1999.There isn't a freestanding relay .The lights are controlled buy the alarm unit .I have the opposite problem my lights won't turn off when door is closed .So far I am stumped -no trouble codes and the alarm functions all work .This maybe one of those rare dealer only fixes .

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Are you sure that the switch in the overhead "center console" (by the rearview mirror) is in the proper position? It's a 3 position switch - position 1 =lights off (even with doors open. pos 2 = lights on  when doors open. pos 3 = lights on all the time...

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