The International S1854 uses H6024 bulbs for both high beam and low beam headlight applications, with this bulb size representing the standard specification across the model line. The replacement chart covers vehicle production spanning 1981 to 1989, detailing bulb size requirements for the designated timeframe.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International S1854 uses the H6024 bulb size for both high beam and low beam headlights across all listed model years, 1981-1989.
The H6024 is an ANSI-standardized sealed beam unit recognized in both the United States and Canada, operating at 12 volts.
A sealed beam unit integrates the filament, reflector, and lens into a single non-serviceable assembly, meaning the entire unit is replaced rather than an internal bulb.
The H6024 follows a 7-inch round form factor, which is a standardized size shared across many vehicle applications of that era, making cross-brand fitment relatively common among vehicles specifying the same ANSI designation.
Because the International S1854 uses the same H6024 specification for both high and low beam positions, the vehicle relies on the dual-filament design built into the sealed beam unit itself to serve both functions from a single housing per side.
The ANSI standardization of the H6024 means that units from different manufacturers carrying the same designation are generally interchangeable, provided the 7-inch round sealed beam format and 12V rating are matched exactly.