Same thing happened to me on my install. I called Crutchfield and they walked me through to be sure my wiring was correct. The instructions were off since the Wrangler uses a different wire layout after 2010. I have an 09 (07 to 09 are the same) so I think thats what you're going through as well.
It's been so long, I don't recall which wires were the problem. Any stereo shop should be able to get you going if the place you purchased it from doesn't have a support line.
Good luck. I know how frustrating it is.