I blew a fuse that shut off my cigarette lighter and aftermarket stereo system (pioneer). It also caused my clock to keep resetting itself everytime the car would turn off. I blew the fuse that controls all 3 under the hood. What happens is that specific fuse controls the memory of the 3. So my stereo and ciggarette lighter require a memory charge so it wouldnt turn on. My clock didnt require it, except to save the time I set it on. So check for another fuse under the hood and of course, look at the interior.