What components are shown in this wiring diagram?

The battery (power source), voltage regulator, starting motor relay, starting motor, alternator, ignition coil, distributor (with rotation shown), four spark plugs (#1–#4), and a water temperature sender.

What do the red lines and letters A, B, C, D indicate?

They are hand-added overlay markings: A points to the battery positive terminal, C and D point to terminals on the starting motor relay, and B points to a terminal on the ignition coil, tracing a direct 'hot wire' routing from the battery to the relay and coil.

What harness assembly numbers appear on the diagram?

14398 ASSY. (the starting motor relay/battery cable area) and 14305 ASSY. (the alternator wiring area).

What wire/circuit numbers are labeled?

Visible circuit numbers include 904, 37, 32, 262, 152, 152A, 38, 35, 4, and 26.

How is the starter cabling routed per this diagram?

A cable runs from the battery to the starting motor relay ('CABLE BATTERY TO STARTING MOTOR RELAY'), the battery is grounded via 'CABLE - BATTERY TO GROUND', and another cable runs from the starting motor relay to the starting motor.

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Ford Starting & Charging Wiring Diagram - Battery, Starter Relay, Alternator, Coil

Starting and charging circuit wiring diagram with battery, relay, alternator, coil

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Wiring diagram of the starting and charging system showing battery, starter relay, alternator, coil and spark plug routing.

AI caption April 2008 · Photo 3 of 4

This document is a scanned factory-style wiring diagram of an early Ford charging and starting system, uploaded as "hotwire.jpg" to a 1968 Ford Ranchero gallery. It illustrates the power source circuit: the battery with its positive cable running to the starting motor relay (cable labeled "CABLE BATTERY TO STARTING MOTOR RELAY") and a ground cable ("CABLE - BATTERY TO GROUND"). From the starting motor relay (part of the 14398 ASSY. harness), a heavy cable runs to the starting motor ("CABLE - STARTING MOTOR RELAY TO STARTING MOTOR"). Also shown are the voltage regulator, alternator (with terminal markings including B and F, part of the 14305 ASSY. harness), ignition coil, distributor cap with rotation direction indicated, four spark plugs (#1–#4), and a water temperature sender. Circuit/wire numbers visible include 904, 37, 32, 262, 152, 152A, 38, 35, 4, and 26. Hand-drawn red overlay lines with callout letters A (battery positive), B (ignition coil terminal), C and D (starting motor relay terminals) appear to indicate a "hot wire" bypass or test routing added by the uploader, connecting the battery positive directly to the relay and coil. The diagram is undated and states no explicit year or model applicability.

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Frequently asked questions

What components are shown in this wiring diagram?: The battery (power source), voltage regulator, starting motor relay, starting motor, alternator, ignition coil, distributor (with rotation shown), four spark plugs (#1–#4), and a water temperature sender.
What do the red lines and letters A, B, C, D indicate?: They are hand-added overlay markings: A points to the battery positive terminal, C and D point to terminals on the starting motor relay, and B points to a terminal on the ignition coil, tracing a direct 'hot wire' routing from the battery to the relay and coil.
What harness assembly numbers appear on the diagram?: 14398 ASSY. (the starting motor relay/battery cable area) and 14305 ASSY. (the alternator wiring area).
What wire/circuit numbers are labeled?: Visible circuit numbers include 904, 37, 32, 262, 152, 152A, 38, 35, 4, and 26.
How is the starter cabling routed per this diagram?: A cable runs from the battery to the starting motor relay ('CABLE BATTERY TO STARTING MOTOR RELAY'), the battery is grounded via 'CABLE - BATTERY TO GROUND', and another cable runs from the starting motor relay to the starting motor.