Alfa Romeo - Car Manuals PDF & Fault Codes DTC Alfa Romeo Car Manuals PDF & Wiring Diagrams are above the page. The history of "Alfa Romeo" is counted with the creation in 1906 of society società Italiana Automobili Darracq, which Portelllo town, located near Milan, it was going to make cars lighter design French engineers under the name "Darracq". Headed given society Ugo Stella. Alfa Romeo Bulletin Board & Forums - Wiring diagram for S4 the colour codes are in section 40-2 (titled: "how to read the wiring diagram") in case you are missing that page, here is a list of the colour codes from my S4 manual. (1991-1994 US 50 state version, so should be correct for your car) Alfa Romeo Car Radio Stereo Audio Wiring Diagram Autoradio ALFA ROMEO Car Radio Stereo Audio Wiring Diagram Autoradio connector wire installation schematic schema esquema de conexiones stecker konektor connecteur cable shema car stereo harness wire speaker pinout connectors power how to install. Alfa Romeo | Auto Italia Sportiva Alfa Romeo Each wiring harness brings with it the peace of mind that only comes from a level of craftsmanship spanning decades. A certificate of authenticity, laminated wiring diagram and a personal level of support also accompany each loom purchased.