I'd probably have to go with Big Sarge on that one. I hate it when people hack my vehicle, and then I have to spend a lot of time setting it right.
Another option is to search for the radio wiring diagrams for your 2003 Wrangler. I think a Clinton or Haynes manual might help best with that. Especially, if you can find the Jeep specific manual and the 2003 wiring diagram. If you buy it, you might want to scan it on a computer and blow it up. The writing on those things can be kind of small. This way you can find out which striped or solid wire carries what function.
I still haven't quite figured that out myself either. For example, there are two orange wires on my radio harness, one has a stripe and one is solid. One says its for illumination on the wire, and the other doesn't say anything on it. If Jeep is going to put writing on the radio wires, then why not put writing on all the radio wires?
Also, on my 1997 Wrangler, there appears to be more than one harness for the radio, because wires appear to be missing from it. For example, I saw only two speaker wires, instead of eight, on the radio harness. I really don't know what the heck that is all about, and I haven't taken the time to figure it out. I could make numerous assumptions, but that might cause more problems, especially when dealing with electricity.
With all these problems to resolve, it might be easier to take it to a professional installer and let them sort it out. Of course, if you are a perfectionist like me, then that could cause more problems, unless you take the time to figure out everything, and do it yourself. I did that on my Mustang and I got a Clinton's manual. I think I'm going to have to do that for my Jeep too. Good Luck.