Credits: https://citroenclassics.wordpress.com/2014/09/23/citroen-ds-instrument-panel-connections/
Sockets are viewed from the back side of the instrument cluster, facing the panel.
Yellow socket
| Temperature gauge (if fitted), to sensor on engine | Fuel gauge (to tank unit) |
| Tachometer (rev counter) | Ignition feed for warning lamps [+] |
| Ground [-] | Instrumentation illumination |
Green socket
| Rear window heater warning lamp (yellow) |
| Alternator (charging) warning lamp (red) | Sidelamps / Dipped beam warning lamp (green) |
| Hydraulic pressure warning lamp (red) | Main beam warning lamp (blue) |
White socket
| Coolant temperature warning lamp (red) | Front brakepad wear warning lamp (yellow) |
| STOP hazard warning light (bottom middle red) | Engine oil pressure warning lamp (red) |
| Right indicator warning lamp (green) | Left indicator warning lamp (green) |
