1978 Ford Bronco Chassis Electrical Wiring Diagram - Lighting, Charging, Wiper
Reference · 1978-1979 BroncoAll 116 wiring diagrams
Scanned chassis-electrical service manual page showing two automotive wiring diagrams with circuit routing and connectors.
Part of 1978-1979 Ford Bronco Wiring Diagrams
This scan is a rotated page from a printed automotive service manual showing two full-page chassis electrical wiring schematics (the page footer reads "CHASSIS ELECTRICAL"). The upper diagram covers interior/body circuits: hazard flasher, stop light switch, heater blower motor with blower motor resistor and blower switch, coolant temperature and oil pressure switches, instrument panel printed circuit connector, light switch, ignition switch, low brake switch, and rear lighting (back-up, license, tail, direction, and right marker lights), with wire color codes such as BLK/YEL, RED/GRN, WHT/BLU, and GRN/RED. The lower diagram covers exterior lighting, charging, starting, and wiper circuits: left and right headlights (high beam), park and directional lights, horn relay, beam select switch, battery with fusible link, starter relay, starter, alternator and alternator regulator, distributor, ignition coil, noise filter, windshield wiper and washer motors, windshield wiper switch, back-up light switch, neutral/clutch safety switch, and two 15A fuses (back-up light fuse and back-up/washer fuse). A reader can trace wire colors between components and identify connection destinations (e.g., "To Ignition Module," "To EGR System," "To Horn Switch"). The page shows no explicit year, make, or model; it was uploaded as documentation for a 1978 Ford Bronco.
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Frequently asked questions
- What circuits are shown on this chassis electrical wiring diagram page?
- Two schematics: one covering the hazard flasher, stop light switch, blower motor/resistor/switch, instrument panel printed circuit connector, light switch, ignition switch, low brake switch, and rear lights (back-up, license, tail, direction, marker); the other covering headlights, park/direction lights, horn relay, battery, fusible link, starter relay, starter, alternator and regulator, distributor, ignition coil, noise filter, windshield wiper/washer motors and switches, back-up light switch, and neutral/clutch safety switch.
- What fuses appear in this diagram and what are their ratings?
- A Back-Up Light Fuse and a Back-Up/Washer Fuse are shown, both apparently rated 15A (the amp markings are only partially legible).
- Is there a fusible link in the charging/starting circuit?
- Yes, a fusible link is shown between the battery and the starter relay/charging circuit in the lower diagram.
- What wire color feeds the blower motor?
- The blower motor is shown with a BLK/YEL wire, and the blower motor resistor connects through wires including RED/BLK, BLU/RED, and BLK/YEL to the blower switch.
- Does the diagram show a neutral/clutch safety switch?
- Yes, a Neutral/Clutch Safety Switch is shown in the lower diagram in the starting-related circuits, along with a Back-Up Light Switch.
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