Car wiring diagrams: Fitting a Ceiling Rose Wiring Diagram, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. In this project you will find an easy to use ceiling rose wiring diagram and a description of what colour wire, be it an earth wire or red or brown live wire, should .How to identify the switched live wire at a ceiling rose united kingdom . Often people remove old light .Fitting the new ceiling rose and reconnecting the cables. Pull the cables through the aperture in the new ceiling rose and fix it to the ceiling. Select the switch cable the one you marked with insulating tape and connect the live the one you marked with the marker pen to terminal ..