1979 Ford Wiring Diagram – Ignition, Charging, Starting & A/C Blower Circuits

This scanned wiring diagram covers two major systems of a Ford vehicle (uploaded as "1979 Wiring"). The upper half shows the starting, charging, and ignition circuits: battery, starter relay, starter motor, three fusible links, ignition switch, neutral safety switch, ignition module, ignition coil, distributor feeding eight spark plugs, tachometer, ammeter (with gauges), charge indicator with 1.1 ohm and 15 ohm resistance wires, alternator, alternator regulator, radio noise capacitor, and choke heater. Wire colors are labeled throughout (e.g., YEL, RED/LT BLU, ORG/LT BLU, DK GRN/YEL, WHT/BLK, BLK/ORG). The lower half shows two A/C-heater blower circuits: a standard A/C control switch version and a version with automatic temperature control including an electric vacuum relay and water temperature sender. Both A/C circuits are fed by Fuse 2 (35A, hot in run) and Fuse 8 (20A, hot in accessory or run), and include the blower switch, blower resistor, blower motor, ambient temperature switch, and A/C clutch solenoid, with color codes such as BRN/ORG, WHT/PPL, BLU/LT GRN, LT GRN/PPL, YEL/RED, and ORG/BLK. A reader can trace power flow, fuse feeds, wire colors, and component connections for diagnosing starting, charging, ignition, and A/C blower problems.