If you have never done this, I strongly suggest you seek professional help. I have seen the following, after checking the wiring 4 ways to Sunday, drilling a hole through a 12 volt bus. Installing an antenna so that it breaks all the fluorescent tubes in the firehouse. Having the ABS system fail. Getting alternator whine that will drive you out of the apparatus. The Astro in the nomenclature means it is a "digital" capable radio. Therefore it has a whole new set of parameters that your "fathers" radio never considered. Motorola has an extensive service network, you should definitely take advantage of it. Even if you are an experienced stereo installer in luxury cars, this is whole new ball game.