Clear wiring diagrams, accurate component callouts, and step-by-step diagnostics — written for the people actually under the hood. Sourced from factory service manuals and validated against the enthusiast community.
Charging, ignition, EFI, lighting, gauges, fuses. Color-coded schematics & common failures.
Available nowL24, L26, L28 — head, cooling, fuel delivery, valve adjustment, common rebuilds.
Coming soon4-speed, 5-speed (FS5W71B/C), syncro replacement, bell housing & clutch hydraulics.
Coming soon
S30 Helper is an independent technical reference for owners of the Datsun 240Z, 260Z, and 280Z (chassis code S30). The goal is to make the well-known but scattered S30 knowledge — factory service manuals, forum threads, decades of owner notes — easier to find when you actually need it.
Diagrams are simplified for clarity and labeled with the wire colors used in the Nissan factory service manual (FSM). For the full original schematic, always cross-reference the FSM for your specific year.
Found a mistake? The S30 community knows these cars better than any single source — corrections are always welcome.
Found a correction, want to suggest content, or have a question? Drop us a note.