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1979 Ford Bronco Wiring Diagram - Ignition & Light Switch, Fuel Gauge Wires

Automotive wiring diagram showing ignition switch, fuel gauge and color-coded circuit branches.

AI caption · Photo 697 of 837

This document is a cropped portion of a factory-style automotive wiring diagram, uploaded as reference for a 1979 Ford Bronco. The visible section shows the wiring around the ignition switch (IGN. SWITCH), the headlight/light switch (LIGHT SWITCH), the dome light and switch (DOME LT. & SW.), the license plate lights (LICENSE LTS.), and the fuel gauge tank sending unit (FUEL GAUGE (TANK UNIT)). Wire color codes are labeled along each conductor, including RED-YEL, WHT-RED, PPL-WHT, GRN-BLK, WHT-BLU, RED-WHT, WHT, YEL, BLK-YEL, RED-GRN, RED-BLU, ORG, BLK-GRN, BRN, BLK-ORG, GRN-YEL, and BLK-BLU. A red box highlights a resistance specification of "105 - 115 Ω" on the RD-GN (red-green) wire feeding the ignition switch, which appears to identify a resistance wire in that circuit. The license lights are fed by BRN wires, and the fuel tank sending unit connects via BLK and ORG wires. The dome light and switch use GRN-YEL and BLK-BLU wires. No year, make, model, or part numbers are printed in the visible portion of the scan; the left edge of the image is cut off, truncating some wire labels.

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Frequently asked questions

What wire colors connect to the ignition switch in this diagram?
The ignition switch shows WHT, PPL-WHT, YEL, BLK-YEL, RED-GRN, RD-GN, and RED-BLU wires.
What resistance value is highlighted on the ignition switch wiring?
A highlighted callout shows 105 - 115 Ω on the RD-GN (red-green) wire to the ignition switch.
What wire colors go to the fuel gauge tank unit?
The fuel gauge (tank unit) is shown connected with BLK and ORG wires.
What wires feed the license plate lights?
Both license lights (LICENSE LTS.) are fed by BRN (brown) wires.
What wire colors are used for the dome light and switch?
The dome light and switch (DOME LT. & SW.) uses GRN-YEL and BLK-BLU wires.

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