International S2155 License Plate Bulb Size

The International S2155 license plate light requires a 1157 bulb size for proper installation and function on the vehicle. Data for the specific lighting component covers the period from 1984 through 1989.

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
1984-1989	1157

Bulb Specifications

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

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Additional Notes

The International S2155 uses the 1157 bulb for its license plate light across the 1984-1989 model years.
The 1157 is an ANSI-standardized bulb type, recognized across the United States and Canada under a shared designation system.
This bulb operates on a 12-volt electrical system, which is standard for automotive applications of this era.
The 1157 is a dual-filament bulb, meaning it contains two separate filaments within a single housing, rated at 21 watts and 5 watts respectively.
It uses a BAY15d bayonet base, a two-pin offset base design that prevents incorrect insertion by positioning the pins at different heights.
The BAY15d base is specific to dual-filament bulbs and is not interchangeable with single-filament bayonet bases such as the BA15s, which shares a similar physical profile but differs in pin configuration.
Although the 1157 is a dual-filament type, its use in a license plate application means only one filament circuit is typically engaged in that position.