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 Bronco reference. It shows the charging system (alternator, alternator regulator, ammeter, noise suppression capacitor), the starting system (starter motor, starter motor relay, 12-volt battery), and both standard and breakerless ignition systems, including 6-cylinder and 8-cylinder distributors, ignition coils, and the breakerless ignition modulator assembly. The ignition switch is shown with its positions labeled S-Start, R-Run, O-Off, and A-Accy. Also included are the horn circuit (horn relay, horn switch, horn), C/V unit, dual brake warning lamp and switch, carburetor throttle emission control solenoid, and gauge circuits: engine temperature gauge/switch, oil pressure gauge/sender, fuel gauge with sender, and a fuel tank selector switch feeding a second fuel gauge sender. Circuit numbers with wire colors are given throughout (e.g., 37 BK-Y, 904 GR-R, 32 R-BL, 16 R-GR, 640 R-Y, 977 P-WA, 286 O), along with connector (C-2xx, C-3xx), ground (G-2xx), and splice (S-2xx) identifiers. A footnote states that rotation and firing order for breakerless ignition is the same as the standard distributor for respective C.I.D. engines.