Check Number Plate Light (electrics question) draining

[jaima]

Hi All,
I had the "check number plate light" and a bulb had blown (it was black)
I decided to connect the multimeter to the plug that runs the lights and
the tailgate latch/lock after the X5 went into sleep mode,
the multimeter gave a reading of 3.41 volts in sleep mode!

Am I right in thinking that this voltage if anything should be in the
milliamp`s range and the voltage is an excessive draw? and this could
possibly be the culprit of my dreaded battery drain

I did take out the dvd player in the boot and got longer than usual
from the battery before it died again.

Any help/info is greatly appreciated guys