Aftermarket Stereo Wiring 2004 Gs Non-navigation

[hazimwood]

Ok guys. Buy the metra kit. Plug the two metra harness adapters into the white harnesses that are on the amp on the passenger side kick panel. Then, the only wire needing a source is the red wire for switch power. So to find the proper source for this, examine the two harnesses that were connected to the back of your factory radio. There is but one wire between the two of them that you need.. the Grey wire is the key. Connect a wire from the factory grey wire to the metra harness red wire. Extend the rest of the harness wires to the new radio's wires and you got it. I'll post pics tomorrow, but I couldn't believe the lack of threads that mention this key detail of the red wire. I figured it out on my own. I was really surprised how easy this was.