I will personally attest to the FACT that ALL SVT's produced all have the SAME wiring harnesses. I had an original '02 SVT, that I bought brand new in SoCal. It came with the audiophile pkg, and nothing else; however it had wiring for seat heaters (I know because one got to dangling out from under the center console, a result of me not tucking it back in after doing my SS install). Then that one got totaled, and I got an '04 SVT 3dr as a replacement. This one however only came with HID's and a moonroof; the Carfax said it was bought new in Oregon. It did not come with Traction Control, heated seats, or the audiophile package. I later bought and installed the audiophile sub and amp and installed them (I yanked my audiophile HU from my old '02 before she was taken away). I never even thought to check to see if there were any fuses to power the new addition; but let me tell you, either the fuses are already there or you don't need any additional fuses for the stock audiophile setup.
In short, ALL SVT's are wired for ALL OPTIONS. Whether they actually receive those options or not is a different story.
Current love affair: 2004 SVTF #953 (Josephina - pronounced hoe-se-fin-a)
RIP: 2002 SVTF #2358, Sent to graveyard on June 11, 2013. I will always remember the good times we had!!
This car made my hair go gray, and did not care.