This lead is designed to fit an aftermarket stereo (Pioneer, Sony, Kenwood ect) into the following vehicles that are fitted with the Audi BOSE and Chorus systems fitted as standard;

Audi

PC9-401

A2: 2000 to 2005

A3: 2004 to 2006 (Symphony Half Amplified)

2002 to 2004 (BOSE Rear Amplified)

2000 to 2002 (BOSE Rear Amplified)

1996 to 2000 (BOSE Rear Amplified)

A4: 2004 to 2006 (Symphony Half Amplified)

2002 to 2004 (BOSE Rear Amplified)

2002 Onwards (Chorus Unit Only)

   2000 to 2002 (BOSE Rear Amplified)

   1999 to 2000 (BOSE Rear Amplified)

   1995 to 1999 (BOSE Rear Amplified)

A6: 2002 to 2004 (BOSE Rear Amplified)

     1994 to 2002 (BOSE Rear Amplified)

A8: 1994 to 2004 (BOSE Rear Amplified)

TT: 1999 to 2006 (BOSE Rear Ampliifed)

PC9-401-KIT  included and connected.

Audi Rear Amplified ISO Adaptor. A harness adaptor

lead allows you to install a car radio of your choice with out cutting any of 

the existing car wiring. All harness adaptor Leads are ISO ended

and will plug directly into the car radio.  PLUG AND PLAY

The blue & White wire on the Red mini ISO plug also needs to be connected to the Blue wire coming off of the New Head Unit (marked Amp Remote). At the same time the blue wire on the PC5-90 adaptor also needs connecting to the Blue wire off the New Head Unit.

To do this cut the blue wire between

the two Black ISO connectors half way along. Plug the blue & white lead supplied

 with the red crimp connector on the end into the bullet connector from the Red Mini ISO plug.

Cut the blue wire from the PC5-90 half way along. After stripping,

feed both the blue from the PC5-90, and the blue coming from black ISO connector which will plug into the New head unit (not the car end) into the Red Crimp connector. Crimp the connector using proper crimping tool.

Once complete both the

PC5-90 and Red & White wire on the mini ISO connector should be getting +12V 

from the new head unit.

This will power the antenna

adaptor and also signal the remote amplifier to switch on.

Note if you have no power at all to the radio when everything is installed,

and you only have two wires on the Audi Power Block, you can use a

PC2-18-4 to get power to the yellow wire on the new radio.