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1979 Ford Bronco F100-F350 Power Distribution & Charging System Wiring Diagram
Reference · 1978-1979 BroncoAll 116 wiring diagrams
Power distribution and charging system wiring schematic (Bronco/F100-350) showing fuse links A-J, junction block, accessory safety relay, alternator and starter relay circuits with/without gauges.
Part of 1978-1979 Ford Bronco Wiring Diagrams
This page from a Ford factory-style wiring diagram set (labeled for 1979 Bronco and F100 through F350 trucks) covers two circuits: Power Distribution and the Charging System. The Power Distribution section shows the battery, auxiliary battery, starter relay, accessory safety relay, junction block, and fuse links A through J, with wire color codes (bl/bk, bk/r, bk/o, bk/y, bk/w, y/bk, r/o, bk/gr, gr/r, w/bk) and splice/connector identifiers (S201, S202, S203, S209, S211, S212, S803, S1102, C206, C208, C1205). Bronco-only branches feed the power tailgate window switch and power tailgate accessory relay (see page 38), while F100-350-only branches feed a lamp relay (page 33) and, on trucks without an auxiliary battery, a camper dome light. Routing differences for trucks with and without gauges (ammeter vs. alternator warning light with 500-ohm resistor) are shown. The Charging System section diagrams the alternator regulator, alternator (with +, stator, and field terminals), choke heater, radio noise capacitor, and connectors C205, C210, and C212. Cross-references point to exterior lighting, trailer brake/lamp circuits (page 18), and marker lamp relay (page 14).
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Frequently asked questions
- Which fuse links are shown in the 1979 Ford truck power distribution diagram?
- Fuse Links A, B, C, D, E, F, G, H, and J are shown. Fuse Link A is on a bl/bk wire, B on bk/r, C on bk/o, D and E on bk/y, G (Bronco Only) on bk/r, H on bk/o, and J on bk/y wires.
- What circuits are Bronco-only in this diagram?
- The Bronco-only section feeds the Power Tailgate Power Window Switch and the Power Tailgate Accessory Relay (both referenced to page 38) via bk/w wires through splice S211, and Fuse Link G is marked 'Bronco Only'.
- How does the charging indicator differ with and without gauges?
- Trucks with gauges use an ammeter connected through C206/C208 on r/o and y/bk wires; trucks without gauges use an alternator warning light with a 500-ohm resistor connected through C208 at connectors marked PC.
- What components are shown in the charging system?
- The alternator regulator, alternator (with + terminal, stator terminal on w/bk wire, and field terminal on o wire), choke heater, radio noise capacitor, and connectors C205, C210, and C212.
- What applies only to F100-350 trucks without an auxiliary battery?
- A branch at splice S803 (bk/gr and r wires) feeding the camper dome light exterior lighting is marked 'Only for F100-350 Without Aux. Bat.'
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