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PDC module is located in the trunk, next to the battery. Is that area of the car dry? could there be any moisture? how old is your battery? has it drained recently?
PDC (A82) is getting power from Terminal 15 (ignition hot) and is activated via the telegram on the iBus, and also via the button on the central switch (A169) - theoretically, if everything is functioning normally, applying and removing power rapidly should not activate the PDC... failing battery on the other hand, is a known source of wild electronic behaviour in the system - the system generates random telegrams on the iBus which may result in flashing lights, windows going up and down, etc, etc, etc... the car acts as if possessed...
Check for loose wires, for dampness in the trunk area, then move onto more complex items...
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01-21-2013, 09:32 PM
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