2007 g6 stereo/radio harness problem.

So a few days ago i got a new stereo unit for my 2007 Pontiac g6, in the process i replaced some of the wiring harness connections. i tested these with an ohm meter and measured no resistance, and tested them with a test light as well, however neither stereo unit turns on when connected. I'm quite sure i followed the correct steps when replacing these as well as got the connections correct. Any insight as to why they wont work?

Well, it's obvious something is not wired right.....I don't know how you can expect us to venture a guess other than that, or figure out what you have done wrong?

Now if your wiring is correct, there is the possibility of a bad new radio....

Well for instance is it possible i blew a fuse/short circuited something? if that's the case i wouldn't know what fuse it would be/what would have gotten short circuited. which fuse box would the stereo fuse be in