| Wiring diagrams for all Volvo 1800 models by Warren Townsend |
| The Wiring Diagrams are presented as Pdf files and quite small file size, but the images are high quality and colored including the wire colors. The image can be zoomed in quite close, or enlarged considerably for printing on large format if required |
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| P1800 1961 – 1963 version 2.7 |
| P1800S 1963 version 2.6 |
| 1800S 1964 version 2.7 |
| 1800S 1965-1968 version 2.6 |
| 1800S 1969 version 2.6 |
| 1800E 1970 version 2.4 |
| 1800E 1971 version 2.4 |
| 1800E 1972 version 2.4 |
| 1800ES 1972 version 2.4 |
| 1800ES 1973 version 2.4 |
| Wiring diagrams for 1972 1800E and 1972-1973 1800ES with all items on a list in Excel with grid references to the diagram, by Jim Perry |
| Wiring diagram 1800 ES 1973 (1.7MB .jpg) Item list on Excel sheet (15KB xlsx) |
| Wiring diagram 1800 ES 1972 (1.7MB .jpg) Item list on Excel sheet (15KB xlsx) |
| Wiring diagram 1800 E 1972 (1.3MB .jpg) Item list on Excel sheet (15KB xlsx) |
| Wiring diagrams for 1800E 1972 and 1800ES 1972 and 1973 by Jim Abernathy and David Farrington |
| Wiring Diagram 1800E 1972 |
| Wiring Diagram 1800ES 1972 |
| Wiring Diagram 1800ES 1973 |
| Volvo 1800S Wiring Diagrams organized by function based on the schematic in the 1968 factory manual. Prepared by Jeff Solt Guinn |
| Wiring Diagram 1800S 1968 |
| Wiring loom 1800ES 1973 RHD |
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| Wiring loom 1800ES 1973 LHD |
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| Wiring diagrams switches Volvo 1800 by Warren Townsend |
 Ignition switch P1800 & S |
 Ignition switch 1800E & ES |
 1800-Lights-Switch-Terminals-V1.0 |
 1800-WiperSwitch-Terminals-V1.2 |
 1800-Heater-Fan-Switch-Terminals-V1.0 |
 1800-HazardSwitch-Terminals-V1.2 |