International 1100D front side marker bulbs measure 194 in size, while rear side marker bulbs measure 97, with each bulb type serving distinct lighting functions on the vehicle. The replacement chart covers 1969 to 1970 model production years and documents bulb size specifications for side marker applications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International 1100D uses two distinct bulb types across its front and rear side marker positions for the 1969-1970 model years, with each position requiring a specific and non-interchangeable type.
The 194 bulb is an ANSI-standardized miniature wedge type in a T10 form factor, rated at 12 volts and 3.78 watts, and serves as the front side marker bulb across both covered model years.
The T10 wedge base of the 194 bulb connects by friction fit rather than a bayonet or screw mechanism, meaning the bulb is held in place by the socket walls alone.
At 3.78 watts, the 194 is a low-output bulb suited to marker and indicator functions rather than primary illumination.
The 97 bulb is an ANSI-standardized single-filament type with a BA15s bayonet base, rated at 12 volts and 13 watts, and serves as the rear side marker bulb across both covered model years.
The BA15s designation indicates a single-contact bayonet base with a 15mm collar, which is not interchangeable with the BA15d double-contact variant despite sharing the same physical locking mechanism.
The 97 is noted as a variant of the 1156 bulb family, though the two are not identical and substitution between them is not supported by these specifications.
The rear side marker draws significantly more power than the front, with the 97 rated at 13 watts compared to the 3.78 watts of the 194, reflecting a difference in output intensity between the two positions.
Both the 194 and 97 conform to ANSI standards recognized in both the United States and Canada, placing them within a shared North American standardization framework.
The Light Duty classification applies to all listed entries for both the front and rear side marker positions across the 1969-1970 model years.