1978 Ford F-150 Alternator & Voltage Regulator Wiring Diagram - Wire Colors

This is a hand-drawn (computer-illustrated) wiring diagram showing the charging system wiring between a Ford voltage regulator (VR) plug and the alternator. On the left, the VR plug connects via a green wire and a yellow wire. On the right side, four wires come from the alternator: an orange wire, a white wire with black tracer, a black wire with red tracer, and a yellow wire. Two intermediate connectors labeled "PLUG" are shown, each marked with a question mark (indicating uncertain identification or terminal). The black wire with red tracer from the alternator passes through a junction splice, joins a yellow wire and a red wire at the second plug, and continues through two fusible links (labeled "FL" in red boxes) to the starter solenoid via a black wire with red tracer. The diagram helps a reader trace which alternator output wires route to the voltage regulator plug, where fusible links are located in the charging circuit, and how the main charge wire (black w/ red) reaches the starter solenoid. It is undated and does not state a specific model year, but it was uploaded for a 1978 Ford F-150 charging system reference.