Need a wiring diagram

I recently purchased a stock Delco CD player/radio and would like to install it into my 1997 GA. From the factory, my car came with the cassette/radio. While I was doing the swap, I noticed my current radio was missing a connector pin that the one I bought had. I tried it anyway and when I connected the new one up, the CD mechanism sounded like it kicked on for about 1/2 a second and then nothing. No power was getting to the new CD/radio after that.

My roommate's an electrician and said he can fix it but will need a wiring diagram. Anyone have a link for one?

Thanks a bunch!

--Jason