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1973-1974 Ford Point-Type Ignition System Circuit Diagram - Coil & Distributor

Wiring diagram of a conventional 1973-1974 point-type ignition system showing battery, coil, distributor, and spark plug with primary and secondary circuits.

AI caption · Photo 1793 of 1799

This document is a labeled schematic diagram of a typical conventional point-type ignition system circuit as used on 1973-1974 vehicles. The diagram illustrates the complete ignition circuit, distinguishing between the primary circuit (shown as a solid heavy line) and the secondary circuit (shown as a dashed line) via a legend. Components labeled in the diagram include the ignition switch (with IGNITION, START, and BATTERY terminal positions), a terminal connector, the primary resistance wire, a quick disconnect, the starter relay (marked with S and I terminals), the battery (with + and − terminals shown), the ignition coil, the distributor with cap and spark plug wires, and a spark plug. Grounds are indicated at the battery negative terminal and near the distributor. A reader can learn how the primary (low-voltage) side of a points ignition system routes power from the battery through the ignition switch, resistance wire, and relay to the coil, and how the secondary (high-voltage) side carries spark energy from the coil through the distributor cap to the spark plugs. The caption at the bottom, partially cropped, identifies it as a typical ignition system circuit used on conventional (1973-1974) point-type systems.

This document covers 1973-1974, which may differ from this 1990 Ford Bronco.

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Frequently asked questions

What years does this point-type ignition diagram cover?
The caption states it is a typical ignition system circuit as used on conventional (1973-1974) point-type systems.
How are the primary and secondary circuits shown in the diagram?
A legend indicates the primary circuit is drawn as a solid heavy line and the secondary circuit as a dashed (dotted) line.
What components are included in this ignition circuit?
The diagram labels the ignition switch (with IGNITION, START, and BATTERY positions), terminal connector, primary resistance wire, quick disconnect, relay, battery, coil, distributor, and spark plug.
Where does the primary resistance wire connect in the circuit?
The primary resistance wire runs from the ignition switch area (after the terminal connector and quick disconnect) to the ignition coil.
What terminals are shown on the relay?
The relay is drawn with terminals marked 'S' and 'I'.

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