No. It works normal when the car is on. I turned the ignition off yesterday and afterwards i was cleaning some stuff in the engine bay, and I heard a real quiet whining noise. I couldn't find what it was at first, but when I did I disconnected the plug from it, and it was still making noise so then I took the positive wire off the back, and it stopped. I reconnected it and the noise went away. At least for now. Thanks