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1968 Ford Ranchero Starting & Ignition Wiring Diagram - Hot Wire Bypass Path

Engine electrical wiring diagram showing power source/battery, battery-to-starter-relay cable, starting motor relay/motor, voltage regulator, alternator, distributor, and ignition coil with circuit numbers.

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This document is a scanned factory-style Ford engine electrical wiring diagram covering the power source, charging, and starting/ignition circuits. It illustrates the battery (labeled POWER SOURCE), the cable from the battery to the starting motor relay, the battery-to-ground cable, the voltage regulator, the starting motor relay, the cable from the relay to the starting motor, the alternator (with B and F terminals shown), the distributor (marked ROTATION), the ignition coil, four spark plugs (#1–#4), and a water temperature sender. Harness assembly numbers 14398 ASSY. and 14305 ASSY. are called out, along with circuit/wire numbers 37, 32, 262, 904, 152, 152A, 38, 35, 4, and 26. The uploader has added red annotations: callout letters A (battery positive terminal), C and D (starting motor relay terminals), E (relay output to starter cable), and B (ignition coil terminal), plus a bold red line tracing a 'hot wire' path from the battery positive terminal directly to the ignition coil — apparently documenting a hot-wire bypass or diagnostic path. The diagram lets a reader identify starting/charging circuit routing, component locations, terminal identification, and circuit numbers for this Ford engine compartment harness.

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Frequently asked questions

What harness assembly numbers are shown on this diagram?
The diagram calls out 14398 ASSY. (battery/starter relay cable area) and 14305 ASSY. (alternator/regulator harness area).
What circuit/wire numbers appear on this wiring diagram?
Visible circuit numbers include 37, 32, 262, 904, 152, 152A, 38, 35, 4, and 26.
What does the red line on the diagram indicate?
A red line traces a path from the battery positive terminal (marked A) down through the diagram to the ignition coil terminal (marked B), with additional red callouts C, D, and E at the starting motor relay — showing a 'hot wire' connection from battery to coil.
Which components are shown in this diagram?
The battery (power source), battery-to-starter-relay cable, battery ground cable, voltage regulator, starting motor relay, starting motor, alternator, distributor (rotation), ignition coil, spark plugs #1–#4, and a water temperature sender.
What cables are labeled on the diagram?
Three cables are labeled: 'Cable Battery to Starting Motor Relay,' 'Cable - Battery to Ground,' and 'Cable - Starting Motor Relay to Starting Motor.'

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