I have the 'plain' factory cassette installed and want to upgrade to a premium setup which I got a good deal on. What changes must be made to do this? My current system has some sort of an amp installed and I'll replace it with the premium one. My cassette HU will be replaced by the premium CD unit. I don't want to purchase any expensive wiring harnesses if I don't have to, but if I do, where can I get them and what's the cost? Does anyone have a wiring harness scheme for the premium setup? I already have one for the current setup.

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98.5 Tour SE Sport 2.5 ATX
Mobile 1
80W low /100 W high beam... in transit


98.5 Tour SE Sport 2.5 ATX
Mobile 1 / Purolator
Bosch Wiper Blade/Arms
60W low /100 W high beam
Clarion DB315 HU
Blaupunkt ODx663 Front and Rear(in progress)
Sony 4045 Amp
"New" cupholders