If ya can't get the wiring figured out, PM me and I'll yank my radio. Brown is the ground, grey/violet is the dimmer... I think the red/white is the 12V switched and black/yellow is constant 12V. It's late.
I'm not sure which go where into what pin. I'm going to a few boneyards here in the next few weeks, I could see if they have an extra harness you could solder in...