BMW E39 IB Signal
Last updated September 7, 2013
This page is on the IB Load Signal, Interior Lights coming out of the general module on pin X254-20. This is the signal that supplies 12 Volts when the car is awake and after 17 minutes of no activity turns off.
The diagram below shows all the things that are powered off of the IB signal from the general module. This is from the E39 5-series.
In case the image doesn't come up I'll list all the items here: driver's door access light, passenger's door access light, right rear access light, left rear access light, interior/reading lamp front, right rear interior light and left rear interior light.