Audi A8 D3 (2002-2005) Horn circuit, without telematics

BLK WIRE BLK/GRN WIRE BRN WIRE CENTRAL ELECTRIC PANEL DUAL HORN RELAY FUSE FUSE 1 (204) FUSE PANEL (AT RIGHT FRONT FOOTWELL) GRN WIRE HIGH TONE HORN HORN BUTTON HOT AT ALL TIMES IGNITION SWITCH LIGHT SWITCH LOW TONE HORN OFF POWER DISTRIBUTION SYSTEM RED WIRE RUN WIRE STEERING WHEEL) YEL WIRE