Nissan Ignition System Wiring Diagram EL-30 - Coil, Distributor & Switch (SEL517D)
Electrical shop-manual page EL-30 ignition system wiring diagram showing battery and fusible link through the ignition switch to the ignition coil, condenser, distributor and spark plugs.
This is page EL-30 from a Nissan factory service manual (Electrical section), showing the Wiring Diagram for the Ignition System (figure code SEL517D). The diagram traces the ignition circuit from the battery through a fusible link (red wire) and white (W) wire to the ignition switch, then via a white/red (W/R) wire to the ignition coil and condenser. An ignition switch continuity table shows which of terminals 1–4 are connected in the OFF, ACC, ON, and ST key positions. The distributor connects to the ignition coil via blue (L) and black/white (B/W) wires, and the diagram shows four spark plugs fed from the distributor cap. Harness connector reference numbers 71M (ignition switch), 14M (battery area), 19M (ignition coil), and 20M (condenser) are marked. All grounds for the battery, distributor, coil, and condenser are indicated. This is a points/condenser-style ignition layout for a four-cylinder engine. A reader can learn the wire colors, connector IDs, ignition switch terminal logic, and overall circuit path needed to diagnose no-spark or ignition wiring problems. Text along the right margin is cut off and illegible.
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Frequently asked questions
- What wire color runs from the ignition switch to the ignition coil?
- A white/red (W/R) wire runs from the ignition switch through the main harness to the ignition coil and condenser circuit.
- Which ignition switch terminals are live in the START position?
- Per the switch continuity table, terminals 1, 3, and 4 are connected in ST; terminal 2 is connected only in ACC and ON.
- What connector numbers are used in this ignition circuit?
- The diagram labels connectors 71M at the ignition switch, 14M near the battery/fusible link, 19M at the ignition coil, and 20M at the condenser.
- How is the battery protected in this ignition circuit?
- A fusible link is shown between the battery and the white (W) feed wire to the ignition switch, with a red (R) wire at the battery side.
- How many spark plugs does the diagram show?
- Four spark plugs are shown fed from the distributor cap, indicating a four-cylinder engine.
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