Wiring Diagrams: Ford Bronco 1966-1977

Technical Reference

Member-uploaded diagrams & documents for this generation. AI-classified; community-verified where badged.

Wiring Diagrams

• Ford Duraspark Ignition Module Wiring Diagram - Blue Connector Conversion
  This document is a hand-annotated wiring diagram, credited to MustangSteve (http://www.mustangsteve.com), showing how to wire a Ford Duraspark ignition module (the version with the blue connector) to a 12-volt…
• 1976-1977 Ford Duraspark II Ignition Wiring Diagram - Blue Grommet Module
  This document is a color-coded wiring diagram for the 1976-1977 Ford Duraspark II ignition system. It shows the ignition switch with RUN and START terminals feeding the circuit: a Red-Green wire supplies power in…
• 1975-1977 Ford Bronco Power Distribution Wiring Diagram - Ignition, Charging
  This is a color-coded power distribution wiring diagram for 1975-1977 Ford Broncos, titled "'75-77 Bronco Power Distribution," with boxed codes referencing a repair locations grid (columns 1-15, rows A-J). It traces…
• Wiring diagram of the early Bronco showing harness routing for the headlight, alternator, starter, engine, dash, frame and taillight harnesses.
• Wiring diagram of Bronco exterior lights and turn signals showing headlamps, marker, turn, stop and back-up lamps, flashers, fuse panel and harness assemblies.
• Ford parts catalog view of the 1966/72 Bronco wiring system showing 14401 and 14290 harness routing, with 6 and 8 cylinder engine details.
• 1970 Ford Bronco Windshield Wiper & Washer Wiring Diagram - Fig. 10.91
  This document is a scanned page from a factory-style wiring diagram, labeled 'Fig. 10.91 Wi...' (caption cut off), showing the windshield wiper and washer circuit for a vintage Ford vehicle. Power comes from a buss bar…
• 1974 Ford Bronco Wiring Diagram - Rear Stop/Turn, Marker, License & Heater Blower
  This document is one page of a factory-style wiring diagram, uploaded as part of a 1974 Ford Bronco documentation set (filename 74wiring3.jpg). It covers the rear lighting circuits and the heater blower circuit. On the…
• 1974 Ford Bronco Wiring Diagram - Headlights, Turn Signals, Wiper & Fuses
  This document is one page of a multi-page factory-style wiring diagram, uploaded as "74wiring2.jpg" for a 1974 Ford Bronco. The schematic covers primarily lighting and accessory circuits: the headlamp switch, headlamp…
• 1974 Ford Bronco Wiring Diagram - Ignition, Charging, Gauges & Horn Circuits
  This is a scanned factory-style electrical wiring diagram sheet (grid-referenced A-F rows, columns 1-16) covering the engine compartment and instrument circuits of an early-1970s Ford vehicle, uploaded as a 1974 Ford…