My girlfriend has an 03 with the standard sound system but does have the CD single disc player. Are the harnesses completely different from the head unit back to the rear speakers on cars with the mach 460 system. I know that the standard systems did not have amplifiers in the rear but not sure on the front. Just curious what harnesses are needed in the conversion. It'd be nice if the harness was prewired for the amps so i wouldn't have to tear the interior out of the car to run the new mach harness. Also, does the 6CD head unit use the same harness as the single cd head unit? I know that a CD harness is needed when going from standard AM/FM to CD, but i already have a CD player. Just wanting to upgrade to the 6 CD. Tips, advice, or experience on doing this is greatly appreciated!!!! Thanks
