To all ICE guru's,
I have recently purchased a Defi Racer Boost Gauge and its not like other style boost gauges in terms that it comes with its own stand alone controller and wiring harness.
After reading the manual/installation guide its apparent that there will be the need to splice the wiring harness of the gauge into existing wires on the car.
Rather than splice into wires on the fuse box I had the idea of using the concert wiring harness loom (one off the bay second hand or from AUDI depending on cost) to tap into providing it has all the correct feeds.
What I need is a wiring diagram or explanation of what colour wire does what on the stereo wiring loom.
If anyone can help it would be great, its a 2002 S3 by the way.