So I heard an electrical whirring noise when I turned off the car from my rear seats behind driver seat, lasted maybe 15-20 seconds then shut off, I caught the last ~3 seconds of it before it died off on video. Excuse the foul language in the video:
Any ideas?
edit I think the youtube compression removed the noise from the video. On my phone speakers I can hear it clearly. It sounds like an electronic gadget that's on a bad pack of batteries if it helps.