He probably meant light control module (LCM). It's behind the right
front kick panel. That's the side panel at the bottom of the right
foot well. It's a black box with cables attached, about 8 to 12 inches
away from the door jamb.
However, if you need to replace the LCM the replacement must first be
coded with the BMW Service tester.
Sounds like you just got this car. Any chance the previous owner
messed with the wiring? Anyway, if you want to fix the problems I
suggest you try one fix at a time or it may get really confusing.