Well I think I'm gonna call it quits on this one. I'm stuck at the old dimmer switch works but there's no current in the fuse for the lights. Also dug out a bunch of custom speaker wiring which led me to discover that the rear speakers are missing. It appears that someone ran their own wire with the last stereo under the rear seats. It'll kill me, but i'm gonna just throw the new stereo in and take it to an electrical place to get the lights fixed.