I was trying to adjust the tune on my 99 Cobra today but when I plug my tuner (sct sf3) in to the OBD port it won't turn on. From what I've read, it could be a blown fuse so I replaced my cigarette lighter fuse but it still isn't working. I know the tuner works because when its plugged into my computer it turns on just fine, but when plugged into the car I get nothing. Does anyone know if there's another fuse I could check, or is there another common issue that could be causing it? Any help is appreciated