Important Distinction: The 2000 Ford Explorer 4.0L *does not* have a distributor; it uses a coil pack with individual coils for each cylinder. Therefore, there are no spark plug wires routed to a central distributor cap. Each coil is directly connected to its corresponding spark plug.
Therefore, there's no "spark plug wire order" on the coil in the way you might be thinking. The order is determined by the physical location of the coil packs relative to the cylinders. You should refer to a diagram in your owner's manual or a repair manual specific to your vehicle year and engine. These diagrams will show you which coil pack is connected to which cylinder.
