From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Wiring diagram for vehicle electrics, including the starter motor, battery, and lighting circuits.
| Identifier | ExFiles\Box 61\2\ scan0205 | |
| Date | 12th November 1923 guessed | |
| Front Relay operated switch Starter Motor Black 80/25 Third starter relay circuit to frame Third 'Ignition' to frame Third 'Hed' lamps to frame Third 'Side' & 'Tail' lamps to frame Blue 40/36 Red & Black 40/36 Green 40/36 Two 'Horns' to switch & frame Remote Connections Box Red and Black Black Black and white Cut Out Battery | ||