Check out the electrical systems / wiring Forum. Lots of really good info. there. Do a search under "G3" and you will get a whack of hits. I am going to do this upgrade in the spring in order to prep the truck for an upgraded sound sytem and some other doo-dads and what-nots. I am not happy with the way the current 65 AMP alternator works and I know that it will die an unpleasant death as soon as I plug in the new amps and stuff.