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Old 06-20-2010, 06:00 AM   #4
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Join Date: Oct 2009
Location: UK
Posts: 1,030
My Ride: 1999 328i
PNP should do it.

The 10k Pull up is to make sure the transistor base comes up above the emitter when the switched GND is not there. TBH even without it the base will probably float up to the emitter voltage.


1) rinse and repeat the circuit for the other LEDs.
2) The pull up will stop any noise accidentally activating the LEDs. Unlikely to happen on such a short wire in a sparesly populated area.

Edit 2:

The Bentley manual looks wrong compared with the OP's description of how the cct behaves. It says in the diagram that a voltage below rail 15 is needed on pins 2-5 to turn on the LEDs.
That appears to be the E46 schematic.
This 6er schematic has replaced it now.

Last edited by Arty; 06-20-2010 at 05:29 PM.
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