Datsun A10 Electrical Schematic – Factory OEM Wiring and Troubleshooting Manual

You pull the wiring diagram from a third-party site and find three different wire colors for the same circuit. That is how weekend jobs turn into fires. The Datsun A10 Electrical Schematic is the original factory document – not a reprint, not a scan of a copy. It was printed for the dealer technicians who diagnosed these cars when they were new. Forty-nine pages of body electrical wiring, component locations, and diagnostic flow charts.

Every fuse, every fusible link, every switch contact – it is all drawn to the factory spec. If you are chasing a lighting fault, a dead gauge, or a wiper that only works in the rain, this manual gives you the test points and the expected readings. No second-guessing.

Body Electrical Wiring: Fuse, Fusible Link, and Unit Locations

Section BE starts with the description of the main harness and the fuse block layout. Page BE-2 covers the fusible link and fuse ratings. The wiring section on BE-3 shows the color codes and routing. Aftermarket diagrams skip the location of electrical units – this manual lists where each relay, switch, and module lives. You get the part numbers and the harness connectors. For a 40-year-old car, knowing where the ground point is saves an afternoon of probing.

Lighting System: Circuit Diagrams and Bulb Specifications

The lighting circuit diagram on page BE-10 is factory-original. Bulb specifications are listed – wattage, base type, and part number. Removal and installation for each lamp assembly is on BE-13. The ignition switch, lighting/turn signal switch, hazard switch, stop lamp switch, back-up lamp switch, door switches, trunk/luggage switches, and tailgate switch – all covered. There is even a dimmer adjustment procedure on BE-19. Troubleshooting for lighting starts on BE-21 with open-circuit and short-circuit checks. That section alone is worth the price if you have a flickering headlight.

Meters and Gauges: Fuel, Water, Oil, Charge, Brake Warning Systems

The combination meter circuit diagram on BE-23 shows every connection. Speedometer calibration, fuel level and water temperature indicator system on BE-26, oil pressure warning system, charge warning, brake warning, tachometer. Each system has its own trouble diagnoses on BE-27. The fuel sender resistance values are given – you can bench-test your sender before reinstalling it. The charge warning system includes the alternator sense circuit. That level of detail does not come from a generic repair book.

Electrical Accessories: Wiper, Washer, Horn, Heater, Defogger

Circuit diagram on BE-28 covers the accessory power distribution. Windshield wiper and washer removal, linkage adjustments, motor testing – BE-31. Station wagon gets rear wiper coverage on BE-33. Horn circuit, cigarette lighter, clock, radio wiring, rear window defogger, and heater blower. Each accessory has its own troubleshooting procedure on BE-39. If your horn blows when you hit the brake, this is where you find the shorted wire.

Trouble Diagnoses and Corrections – Why This Manual Stops the Guesswork

Three dedicated trouble diagnoses sections: lighting (BE-21), meters (BE-27), and accessories (BE-39). Each one walks through symptoms, possible causes, and test steps. These are the same checklists the factory trained techs used. You get voltage drop tests, continuity checks, and component resistance specs. No aftermarket wiring schematic gives you that. You pay for a paper diagram and get a picture of wires. You pay for this manual and get a diagnostic flowchart.

Related Manuals

• Datsun Electrical Service Guide Manual – broader electrical coverage for multiple models.
• Datsun 510 PL521 1968-1973 Workshop Manual – full mechanical and electrical for the 510 platform.
• Datsun 1200 1969-1973 Workshop Manual – engine, chassis, and body wiring for the 1200 series.

For background on the evolution of automotive wiring, check the Automotive Industry Overview. The battery and charging system fundamentals are explained in Automotive Battery. These external resources complement the factory manual but do not replace it.

Does this manual cover the whole car?

No. It covers body electrical only – lighting, gauges, accessories, and wiring harness. Engine electrical is in the engine section of the full service manual.

Can I use this for engine wiring?

Engine electrical is not in this manual. The schematics are factory-correct for the A10 body systems. For engine management, you need the separate engine manual.

Are there torque specs in this manual?

This is an electrical schematic, not a mechanical manual. Torque specs for fasteners are in the chassis and engine manuals. Fuse ratings, bulb wattages, wire colors, and pin assignments are all here.

The trouble diagnoses sections – are they useful?

Yes. The lighting system trouble diagnoses on page BE-21 walks through open circuits, short circuits, and bulb failures step by step. The gauges section on BE-27 covers fuel level sender checks, water temp sensor resistance, oil pressure switch continuity, and charge warning. That is the kind of diagnostic procedure you cannot get from an aftermarket wiring diagram. You get the actual factory test points and expected readings. For a car that is fifty years old, that means you test the component before you replace it – not swap parts until something works.

You have the car on the lift, the multimeter is set, and you need the factory path through the harness. This manual puts the original wiring and diagnostic steps on your bench. No fluff, no generic sketch – just the OEM data. Download the Factory Manual.