My 1998 A4 has the standard concert tape deck with the factory rear amp and speakers.

Which of the coloured wiring blocks that go into the rear of the radio contain the wiring that carries the low voltage signal to the amp?

Stu

 

This article should tell you about the wiring diagrams and such. it should be the same for b5 a4's... good luck

:: a4mods.com :: - The Premiere Audi A4 Modification Guide and Pictures Library

- Fish

 

i was wondering if you were ever able to find a diagram or color code for the wires going to the rear stock amp?

 

..........Sorry. File too big.