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

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).