I've searched for this problem and couldn't find it. Sometimes when its cold out and I turn on my lights, this steady tone comes out of my sterio. I have the stock cd player and I've done nothing to my headlights. I've heard something about grounding kits somewhere. So my question where could I find one of these grounding kits, is that what I need and/or how do I go about fixing this without one? I am very electronically inclined so that area is not a problem. I have access to a soldering iron if I require one and I'm not afraid to use it.