Ford Excursion Tail Light Bulb Size

Additional Notes

• The Ford Excursion uses the 3457 bulb across all model years covered in these specifications, spanning 2000-2005.
• The 3457 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
• The 3457 is a dual-filament bulb, which means it contains two separate filaments within a single housing, allowing it to serve more than one lighting function from a single socket position.
• The two filaments in the 3457 operate at different wattages: 27W for the higher-intensity filament and 7W for the lower-intensity filament, corresponding to distinct lighting modes such as stop and tail functions.
• The 3457 operates on a 12-volt electrical system, consistent with the standard automotive voltage found in passenger vehicles and light trucks.
• The bulb follows a T25 wedge form factor, a designation that describes the shape and base type of the bulb used for physical fitment into the socket.
• Because the 3457 is a dual-filament type, substituting it with a single-filament bulb of a similar base would result in the loss of one lighting function, making filament count a critical factor in replacement compatibility.
• The consistent use of the 3457 across the entire 2000-2005 Ford Excursion production run indicates that the tail light socket and circuit design remained unchanged throughout those years.