1997 Audi Cabriolet Amplified System Wiring - FYI

I couldnt find it anywhere on here so im posting this up to help future installers if they ever have any problems with this veh.

So basically the Veh has a factory amp and sub. Using a standard 70-1784 harness will allow you to get 12v, acc, ground and front speakers.  All wiring diagrams show that the white wire is amp turn on along with power ant.  This does not intergrate into the rear speakers. Also using a 70-1785 harness WILL NOT intergrate with the amp either, the harness are completely different. So after spending a little time i figured it out.

If you remove the bottom of the back seat you will see a harness running across the middle this harness has:

Red : 12v, Brown: ground, and white and twisted speaker pair. 

To get this to work you need to run amp turn on and your rear speaker wires green, and purple set from the radio to the rear seat. Amp turn on gets hooked up to the white wire and the speakers get hooked into the twisted pair.

On the other side you will also find a twisted pair of speaker wires.

so under the rear seat you need to hook up\

Left rear : + Blue / YELLOW - tan/red

Right rear : + BROWN / red - Tan/red

White + Remote turn on

Doing all this will power and send signal to the factory rear speaker and subwoofer.

Hope this helps someone.

~Rich~