What vehicles does this 1979 Ford trouble-shooting manual cover?

It covers electrical and vacuum system trouble-shooting for 1979 Ford F-100/350 Truck and Bronco vehicles.

What do the wire color abbreviations mean in this manual?

Black=bk, Brown=br, Dark Blue=db, Dark Green=dg, Gray=gy, Light Blue=lb, Light Green=lg, Orange=o, Purple=p, Pink=pk, Red=r, White=w, Yellow=y. For two-color wires, the first color is the base wire color and the second is the auxiliary marking: D=dash/dots, H=hash marks, no letter=stripes (e.g., bk/lg H is black with light green hash marks; br/o is brown with orange stripes).

What do the symbols PC, S, and G mean in the schematics?

PC = Printed Circuit, S = Splice, and G = Ground.

What page is the fuse block information on?

The Contents lists the Fuse Block on page 3.

Where can I find the charging system and ignition diagnostics in this manual?

The Charging System is on pages 5-9 and Ignition/Start-Ignition is on pages 5, 10, and 11 per the Contents.

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1979 Ford F-100–F-350 & Bronco Wiring Manual - Intro, Wire Color Codes, Contents

1979 Ford F-100/350 Truck and Bronco electrical & vacuum troubleshooting manual introduction and symbol legend

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Introduction page of the 1979 Ford F-100/350 truck and Bronco electrical/vacuum troubleshooting manual; lists the wire color/symbol designations (PC printed circuit, S splice, G ground) and contents index.

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This is the introduction and table of contents page from a 1979 Ford electrical and vacuum trouble-shooting manual covering F-100 through F-350 trucks and the Bronco. The Introduction explains the manual's step-by-step "condition/step" diagnostic approach (IF...ACTION format), notes that no special tools are required, warns that wire colors and connector locations may change during the model year, and advises verifying battery charge before electrical diagnosis. The "How to Use this Manual" section explains that schematics use graphic symbols in place of internal wiring diagrams for components like the alternator and regulator, and refers readers to the 1979 Ford Light Truck Shop Manual for component repair details. A "Special Symbols/Color Designations" section defines symbols (PC = Printed Circuit, S = Splice, G = Ground) and wire color abbreviations (bk, br, db, dg, gy, lb, lg, o, p, pk, r, w, y), explaining two-color wire notation with dash (D), hash (H), or stripe markings. The Contents column lists page numbers for all systems covered, including charging system (5-9), ignition (5, 10, 11), fuse block (3), lighting circuits (12-26), warning lights and gages (27-31), accessories (31-38), heating/AC (39-44), vacuum systems (44-45), and speed control (47).

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Frequently asked questions

What vehicles does this 1979 Ford trouble-shooting manual cover?: It covers electrical and vacuum system trouble-shooting for 1979 Ford F-100/350 Truck and Bronco vehicles.
What do the wire color abbreviations mean in this manual?: Black=bk, Brown=br, Dark Blue=db, Dark Green=dg, Gray=gy, Light Blue=lb, Light Green=lg, Orange=o, Purple=p, Pink=pk, Red=r, White=w, Yellow=y. For two-color wires, the first color is the base wire color and the second is the auxiliary marking: D=dash/dots, H=hash marks, no letter=stripes (e.g., bk/lg H is black with light green hash marks; br/o is brown with orange stripes).
What do the symbols PC, S, and G mean in the schematics?: PC = Printed Circuit, S = Splice, and G = Ground.
What page is the fuse block information on?: The Contents lists the Fuse Block on page 3.
Where can I find the charging system and ignition diagnostics in this manual?: The Charging System is on pages 5-9 and Ignition/Start-Ignition is on pages 5, 10, and 11 per the Contents.