International 1110 front side marker bulbs measure 194 in size, while rear side marker bulbs measure 97 in size. The replacement chart covers 1971 to 1973 vehicle production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International 1110 uses two distinct bulb types across its front and rear side marker positions: the 194 and the 97, both conforming to ANSI standards recognized in the United States and Canada.
The 194 is a miniature wedge bulb in the T10 form factor, rated at 12V and 3.78W, and serves as the front side marker bulb across the 1971-1973 model years.
The T10 wedge base of the 194 is a tool-free, push-in fitting, which is a common trait of low-wattage marker and courtesy light applications.
The 97 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 13W, and fills the rear side marker position across the 1971-1973 model years.
At 13W, the 97 draws considerably more power than the 3.78W 194, reflecting the greater visibility demands typically placed on rear marker lighting.
The 97 is noted as a variant of the 1156 bulb. While the two share a single-filament design and BA15s bayonet base, they are not identical, and substituting one for the other without confirming wattage and base pin offset compatibility may result in incorrect fitment.
The BA15s bayonet base of the 97 uses a single locating pin, distinguishing it from the dual-pin BA15d base. This difference is relevant when cross-referencing replacement bulbs.
The 1973 front side marker position lists the 194 without a duty classification, while the 1971-1972 entries specify Light Duty. The rear side marker position carries the Light Duty designation across all three years.