What does the blue zig-zag line in this wiring diagram represent?

According to the annotation, the blue zig-zag line is the resisted wire (the resistor wire). It comes from the ignition switch to a splice where a brown wire comes off, then continues to the connector for the coil.

What is the resistance value of the ignition resistor wire shown?

The diagram marks the resistor wire circuit at 105-115 Ω (ohms).

What wire colors connect to the ignition switch in this diagram?

Wires shown at the ignition switch include WHT, PPL-WHT, YEL (two), BLK-YEL (two), RED-GRN, RD-GN, and RED-BLU.

How many wires come off the ignition switch for the resistor circuit, per the annotation?

Two wires come off the ignition switch; one splits into three other wires, and the other is the resistor wire that goes to a splice (where a brown wire branches off) and then to the coil connector.

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1979 Ford Bronco Ignition Switch & Resistor Wire Diagram - Wire Colors

Ignition wiring diagram with handwritten notes about resistor wire from ignition switch

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Wiring diagram detailing ignition switch wiring with annotations identifying the resistor wire to the coil.

AI caption March 2007 · Photo 704 of 848

This document is a cropped scan of a Ford wiring diagram focusing on the ignition switch circuit, uploaded to illustrate the ignition resistor wire. The diagram shows the ignition switch (labeled IGN. SWITCH) with its connector and the wires attached to it, including WHT, PPL-WHT, YEL (two), BLK-YEL (two), RED-GRN, and RED-BLU circuits. A red box on the diagram highlights a resistance specification of 105-115 Ω associated with the resistor wire. An upper group of harness wires is labeled RED-YEL, WHT-RED, PPL-WHT, GRN-BLK, WHT-BLU, and RED-WHT. The right side of the diagram shows BRN wires feeding the LICENSE LTS. (license lights) and BLK/ORG wires going to the FUEL GAUGE (TANK UNIT). An annotation added by the uploader explains that the blue zig-zag line represents the resisted (resistor) wire: two wires come off the ignition switch, one splits into three other wires, while the other is the resistor wire, which runs from the ignition switch to a splice where a brown wire branches off, then continues to the connector for the ignition coil. The document is useful for identifying and tracing the ignition resistor wire and related wire colors.

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Frequently asked questions

What does the blue zig-zag line in this wiring diagram represent?: According to the annotation, the blue zig-zag line is the resisted wire (the resistor wire). It comes from the ignition switch to a splice where a brown wire comes off, then continues to the connector for the coil.
What is the resistance value of the ignition resistor wire shown?: The diagram marks the resistor wire circuit at 105-115 Ω (ohms).
What wire colors connect to the ignition switch in this diagram?: Wires shown at the ignition switch include WHT, PPL-WHT, YEL (two), BLK-YEL (two), RED-GRN, RD-GN, and RED-BLU.
How many wires come off the ignition switch for the resistor circuit, per the annotation?: Two wires come off the ignition switch; one splits into three other wires, and the other is the resistor wire that goes to a splice (where a brown wire branches off) and then to the coil connector.
What other circuits are visible on the right side of the diagram?: BRN wires feeding the LICENSE LTS. (license lights) and BLK/ORG wires going to the FUEL GAUGE (TANK UNIT).