International S1954 License Plate Bulb Size

The International S1954 license plate light uses a 1157 bulb size for the rear illumination system. Data for the specific lighting component covers the period from 1981 through 1990.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1981-1990	1157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157

Other Locations

Additional Notes

The International S1954 uses the 1157 bulb for the license plate position across the 1981-1990 model years.
The 1157 is an ANSI-standardized bulb type recognized in both the United States and Canada.
It is a dual-filament bulb, meaning it contains two separate filaments within a single envelope, each operating at a different wattage.
The two filaments operate at 21W and 5W respectively, with the lower-wattage filament typically serving a secondary illumination function.
The 1157 uses a BAY15d bayonet base, which features two offset pins at different heights to ensure correct orientation during installation and prevent incorrect seating.
The bulb operates on a 12V electrical system, consistent with standard automotive voltage.
The BAY15d base is not interchangeable with single-filament bayonet bases such as the BA15s, as the pin configuration differs to accommodate the dual-filament design.