International S1754 Back Up Light Bulb Size

The International S1754 back up light utilizes a 1156 bulb size for illumination purposes. Available data covers the specific range from 1981 through 1989 for the mentioned vehicle.

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
1981-1989	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The International S1754 uses the 1156 bulb for the back up light across all listed model years, spanning 1981-1989.
The 1156 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 1156 operates on a 12-volt electrical system and draws 21 watts, which is consistent with standard automotive incandescent back up light applications.
The 1156 is a single-filament bulb, meaning it serves only one lighting function, as opposed to dual-filament types that handle two functions such as braking and running light within a single housing.
The 1156 uses a BA15s bayonet base, where "BA15s" denotes a bayonet fitting with a 15mm base width and a single contact pin, which determines physical socket compatibility.
The BA15s single-contact base of the 1156 is not interchangeable with BA15d sockets, which require a dual-contact base, making socket type a critical factor in fitment for the International S1754.