1978-79 Ford F-Series Chassis Wiring Diagram - Fuse Box, Lighting & Charging

This is a scanned page (page 6-30, 'Chassis Electrical') from a repair manual showing two chassis wiring diagrams for 1978-79 Ford F-Series trucks. Figure 86 (diagram 85766101), 'section one,' covers the fuse box (with fuse positions such as INST LT 3A, FUEL TANK 15A, CTSY/CIG 15, DIRECT. 20A, HAZ/STOP LT 20A), hazard and directional flashers, stop light switch, directional switch, ignition switch, low brake switch, light switch, instrument panel printed circuit connector, blower motor, blower motor resistor and blower switch, oil pressure and coolant temperature switches, and rear lighting (tail, back-up, license, marker, and direction lights) with wire color codes. Figure 87 (diagram 85766102), 'section two,' covers the front lighting and charging/ignition systems: headlights, park and direction lights, marker lights, beam select switch, horn relay, battery, fusible link, starter relay and starter, ignition module, distributor, ignition coil and noise filter, back-up light switch and 15A fuses, neutral/clutch safety switch, windshield wiper motor and switch, washer motor, alternator, and alternator regulator. Wire colors (e.g., BLK/YEL, RED/GRN, WHT/BLU) are labeled throughout. A reader can trace circuit paths and wire colors for lighting, ignition, charging, and wiper systems on these trucks.