What ignition module does this diagram apply to?

The '76–'77 Duraspark II ignition module with the blue insulator (blue grommet).

What is the ballast resistor value in the Duraspark II circuit?

1.1 ohm, in the Brown wire circuit between the ignition switch RUN feed and the coil.

How is the ignition coil connected?

The coil's + BAT terminal receives power (via the resistor circuit and starter solenoid I terminal path), and the - DEC terminal connects toward the module/distributor side.

What pins are used on the module connectors?

A two-pin connector uses pins 4 and 5; the distributor pickup connector uses pins 9, 10, and 11; and a four-pin connector uses pins 1, 3, 7, and 8.

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1976-1977 Ford Duraspark II Ignition Wiring Diagram - Blue Grommet Module

Color-coded wiring diagram for '76-'77 Duraspark II ignition system

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Wiring diagram of a 1976-77 Ford Duraspark II ignition showing ignition switch, ballast, connectors and color-coded wires to the ignition module.

AI caption July 2021 · Photo 7 of 33

This document is a color-coded wiring diagram for the 1976–1977 Ford Duraspark II ignition system. It shows the ignition switch with RUN and START terminals feeding the circuit: a Red-Green wire supplies power in START, and a Brown wire through a 1.1 ohm ballast resistor supplies power in RUN. Power routes to the ignition coil, whose terminals are marked + BAT and - DEC, and to the starter solenoid (terminals S and I). The diagram details the connector pinouts between the harness, distributor pickup, and the ignition module, which is identified as the version with a blue insulator (blue grommet). Wire colors to the module are labeled: Blue, Red-Blue, Green-Yellow, Orange-Yellow, Purple-Blue, and Black-Green. Connector pin numbers shown include 4 and 5 on the two-pin connector, 9/10/11 on the distributor pickup connector, and 1/3/7/8 on the four-pin module connector. A reader can use this diagram to wire or troubleshoot a Duraspark II ignition conversion or repair on a '76–'77 Ford, verifying correct wire colors, pin assignments, resistor value, and coil/solenoid connections.

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Frequently asked questions

What ignition module does this diagram apply to?: The '76–'77 Duraspark II ignition module with the blue insulator (blue grommet).
What is the ballast resistor value in the Duraspark II circuit?: 1.1 ohm, in the Brown wire circuit between the ignition switch RUN feed and the coil.
What wire colors connect to the blue-grommet Duraspark II module?: Blue, Red-Blue, Green-Yellow, Orange-Yellow, Purple-Blue, and Black-Green.
How is the ignition coil connected?: The coil's + BAT terminal receives power (via the resistor circuit and starter solenoid I terminal path), and the - DEC terminal connects toward the module/distributor side.
What pins are used on the module connectors?: A two-pin connector uses pins 4 and 5; the distributor pickup connector uses pins 9, 10, and 11; and a four-pin connector uses pins 1, 3, 7, and 8.