Battery? Fuse box? if you run it to the fuse box get a test light or meter and find a hot wire when the key isnt on, but try not to use the headlights or something important so you dont overload (although it shouldnt be a problem) but you never know. Then enjoy the XM, it beats the hell outa local radio <img src="/forums/images/graemlins/kewl.gif" alt="" />