International COF5870 Paystar Back Up Light Bulb Size

The International COF5870 Paystar back up light requires a bulb size of 199 for proper installation. Data for the specified component covers the range from 1985 to 1988.

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
1987-1988	199
1985	199

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W.	199

Other Locations

Additional Notes

The bulb size 199 is the sole back up light specification across all listed model years of the International COF5870 Paystar.
The 199 bulb follows the ANSI standard recognized in both the United States and Canada, placing it within a regulated specification framework common to North American automotive applications.
As a single-filament bulb, the 199 is designed to serve one dedicated lighting function, which aligns with its role as a back up light where a single output is sufficient.
The 199 uses a BA15s bayonet base, a single-contact bayonet mount that requires correct rotational alignment during installation to seat properly.
The 199 is rated at 12 volts and 21 watts, consistent with standard 12V automotive electrical systems and a moderate wattage output typical of incandescent back up lights.
The 199 is noted as a variant of the 1156 bulb. While the two share similar electrical characteristics, they are not always interchangeable due to potential differences in physical fit and base contact configuration, and substitution warrants verification against the specific socket and housing.