Dad just picked up a really clean 06 for a hell of a deal. It has Sirius in it and we went to move the account over to that radio. However, I can't get it to work. The radio never activates, and I never even get the commercials on 184 (preview).

I also have an 06 with an aftermarket system in it, so I swapped my Sirius tuner and radio and got the same result. Next, I plugged in a different antenna to rule that out, and still no go. The only thing I haven't swapped is the wire harness that goes from the Sirius tuner to the radio (don't have one readily available).

What are the chances that this wire is bad? I've already ruled out the tuner, radio, and antenna - so as far as I know that's the only thing left.

Any ideas?