I was just about to post that, I just had the exact same problem with installing my new HU in the tour. It wouldnt power up even though it had key on power to it. Turns out it needed the yellow wire with power too, and that had a blown fuse.

"Moore has also accused the American people of being the stupidest, most naive people on the face of the Earth. And after last weekend, he's got the box office numbers to prove it!"