Ford Tractor Ignition Switch Wiring Diagram | Free Wiring Collection of ford tractor ignition switch wiring diagram. A wiring diagram is a streamlined traditional photographic depiction of an electric circuit. It shows the parts of the circuit as streamlined forms, and the power as well as signal connections between the gadgets. Free Ford Wiring Diagrams - Carsut Ford Ignition Switch Wiring Diagrams. This is another important wiring diagram. It is crucial for anyone who wants to repair or do something related to the ignition switch. Ignition Switch Connector, brake warning switch, dash brake light, dash warning lamp, starter relay, battery, and some other important parts are available in this diagram.