What alternator options are shown in the 1979 Bronco charging system diagram?

Fig. 10.134 shows 40 amp, 60 amp, and 70 amp alternators, each connecting through connector C-201 with wire 38 BK-R, plus alternator regulators for versions with and without gauges.

What wire color is the trailer battery feed on a 1979 Bronco?

Circuit 37 BK-Y (black with yellow) feeds the exterior lighting trailer battery feed and the trailer lamps relay.

What are the ignition switch positions shown in the diagram?

The ignition switch positions are labeled S-START, R-RUN, O-OFF, and A-ACCY (accessory).

Which wire runs to the 4-wheel drive indicator lamp?

Wire 297 BK-GR (black-green) goes to the Axle Control, 4-Wheel Drive Indicator Lamp circuit.

Which engines does the starter motor shown apply to?

The starter motor in Fig. 10.134 is labeled for the 300, 302, 351 and 400 engines.

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1979 Ford Bronco Wiring Diagram - Ignition, Charging & Starting Circuits

1979 Ford Bronco Wiring Diagram (Haynes Fig. 10.133)

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Haynes 1979 Bronco wiring schematic (continued) detailing circuit runs, splices and connectors with wire-color and gauge identification.

AI caption May 2007 · Photo 100 of 126

This page (page 263) from a Haynes repair manual contains two wiring diagram sections for the 1979 Ford Bronco: Fig. 10.133 and Fig. 10.134 (both marked "continued"). The upper diagram (Fig. 10.133) covers the headlamp switch, ignition switch (positions: Start, Run, Off, Accessory), junction block, fuse links, and fuse panel connections (fuses F-2 through F-12), with a detailed right-hand legend listing circuit numbers, wire colors, and destinations — including power tailgate, trailer electric brake, ammeter, alternator/regulator, horn and speed control, interior and instrument panel illumination, courtesy lamps, emergency flasher, seatbelt warning, throttle solenoid/actuator, A/C-heater mode switch, windshield wiper/washer, backup lamps, turn signal flasher, radio, trailer battery feed and lamps relay, marker lamps relay, and 4-wheel drive indicator lamp. The lower diagram (Fig. 10.134) covers the charging and starting system: 40, 60, and 70 amp alternators, alternator regulators (with and without gauges), radio ignition interference capacitor, electric choke, 12-volt battery, starter motor relay, ammeter, and starter motor for 300/302/351/400 engines. Wire circuit numbers and color codes (e.g., 38 BK-R, 152 Y, 904 GR-R) and connector/splice identifiers (C-201, S-212, G-203, etc.) are shown throughout.

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Frequently asked questions

What alternator options are shown in the 1979 Bronco charging system diagram?: Fig. 10.134 shows 40 amp, 60 amp, and 70 amp alternators, each connecting through connector C-201 with wire 38 BK-R, plus alternator regulators for versions with and without gauges.
What wire color is the trailer battery feed on a 1979 Bronco?: Circuit 37 BK-Y (black with yellow) feeds the exterior lighting trailer battery feed and the trailer lamps relay.
What are the ignition switch positions shown in the diagram?: The ignition switch positions are labeled S-START, R-RUN, O-OFF, and A-ACCY (accessory).
Which wire runs to the 4-wheel drive indicator lamp?: Wire 297 BK-GR (black-green) goes to the Axle Control, 4-Wheel Drive Indicator Lamp circuit.
Which engines does the starter motor shown apply to?: The starter motor in Fig. 10.134 is labeled for the 300, 302, 351 and 400 engines.