I still have a question about the Starmate Replay ST2...is it 12v or 5v? I wired it for 12 because the only info I could find was pointing that way, but I really could not find much on it.
You're correct, it is a 12v input. How did you wire it? Some people tend to think that cutting a cigarette lighter adapter and hardwiring it is sufficient, but IMO it's a bit dangerous. To do it safely and correctly a lot of people use this: SIRIUS Vehicle Power Hardwire Kit It's what we always suggest for any hardwire situation.