Expedition 4WD V8-5.4L VIN 5 (2006)
Ignition Switch: Diagram Information and Instructions
All wiring connections between components are shown exactly as they exist in the vehicles. It is important to realize, however, that no attempt has
been made on the diagrams to represent components and wiring as they physically appear on the vehicle. For example, a 4-foot length of wire is
treated no differently in a diagram from one that is only a few inches long. Furthermore, to aid in understanding electrical (electronic) operation,
wiring inside complicated components has been simplified.
Complete Circuit Operation
Each circuit is shown completely and independently in one set. Other components that are connected to the circuits may not be shown unless they
influence the circuit operation.
Current Flow (1)
Each set normally starts with the component that powers the circuit, such as a fuse or the ignition switch. Current flow is shown from the power source
at the top of the diagram to ground at the bottom of the diagram. A full representation of the power supply of a fuse or the power distribution from a
fuse to various components is given in the Power and Ground Distribution Diagrams. Full representation of the ground connections are shown in the
Power and Ground Distribution Diagrams.
Switch Positions (2)
Within a diagram, all switches, sensors and relays are shown "at rest" (as if the ignition switch were OFF).
A dashed line indicates that the splice is not shown completely. A referance is given to the page where the splice appears in full. It is also listed in the
Component Referencing (4)
Each Component on a diagram has a reference to the component location view or the diagram where it is shown completely. It is located to the right of
Component Names,Notes and Base Part Numbers (5)
Component names are placed on the right hand side of each component. Any notes that describe switch positions or operating conditions follow the
name. Descriptions of the internals of the component are also included here. The diagram where the component appears in full is listed in the Index.
The base part number for a component is listed in parentheses next to or under a component. These part numbers will appear any place the component
name appears in the publication.
Internal Name and Function Identification Numbers (6)