When I turn off my vehicle, I continue to hear what sounds like an electrical hum for a few minutes. I don't know where it is coming from, maybe the sunroof. The sunroof doesn't open or close immediately when I push the button, it takes several times pushing the buttons.
Electrical noise inside vehicle
on 2006 Hyundai Tiburon
It could be many things, unfortunately and without hearing the noise first hand or being able to do some basic diagnostic tests or be able to drive the car, its hard to say what the source of the noise may be. Hyundai as a car manufacturer put a lot of free technical information and workshop manuals on line for Hyundai owners. Check out www.hmaservice.com lots of great information.