Rear interior dome lights come on when unlocking car?

[Lowblock]

Originally Posted by TerminatorX5

this is the problem with aftermarket devices and BMWs - the BMW does not use dry contact to monitor door status, it is using Hall Effect sensor to report to door module, that sends an iBus telegram to GM module that commands the LCM module to react in certain way.
you need to intercept that signal, let the relay take over the door contact wire and take it from there...

This

The "door" wire on the alpine is going to be a pos or negitive trigger, my guess is probably negitive trigger. The harness you have pictured, does that go to one of the dome lights? Other O/H monitors usually have provisions for many different makes to allow it to connect to different autos. If your connector goes to the lights then there has to be a power and a ground to the bulb somewhere, sometimes they are always present with a "trigger" and sometimes one is there and one is not depending on door status. If you probe the wires with a DMM you should find something that "opens" and "closes" you can probably use that and a relay to get the lights to come on, however they will not fade like the rest of the lighting.