Hey all. I installed a new headunit in my 2010 GT not long ago and noticed that the screen doesn't auto dim or anything when the headlights are on. I called Crutchfield's support and they told me that the "Illumi" wire in the new harness is supposed to be used for that but that there's no where to use it in the Vibe. I find that kinda hard to believe so I'm coming here for some help.
The picture below shows the mess of wires I have behind the unit and you can see the Illumi wire in there (circled in red).