That's what drew my attention to it, I was charging it in the workshop and noticed the ignition switch lamp didn't go off, thought just a bad door switch so left it. Then few days later only headlights flashing on/off. Traced that till the auto headlamp relay in fuse box doing this which I think is either connected to bcm or alarm. Just found that I probably don't have a full alarm fitted (vtss) so that's why I can't trigger alarm although I have ultrasonic sensors. Interior lights still stay on for a long while once doors closed and even with key on. Sorry for the novel!