Yeah that dimmer can be a tricky one. I had 2 orange wires on the harness, one marked dimmer (maybe i haven't found the switch yet but I don't think I have one, i'm used to all the buttons and switches in my chevy). 1 was marked illumination. So i hooked up the illumination wire instead, and that apparently blows the accessory fuse
That'll teach me to ignore the fact that the illumination wire didn't have a white stripe (like the one coming out of the radio harness) while the dimmer wire did have a white stripe. At least it was an easy fix
Moral of the story; Pretty colors, match em up. Don't second guess it.