International A132 side marker bulbs utilize 194 size for front positions and 97 size for rear positions. The replacement chart covers 1957 to 1958 model 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 A132 uses two distinct bulb types across its front and rear side marker positions: the 194 for the front and the 97 for the rear, covering the 1957-1958 model years under the Light Duty classification.
The 194 is an ANSI-standardized miniature wedge bulb in the T10 form factor, rated at 12V and 3.78W. The T10 designation refers to a tubular bulb body measuring ten-eighths of an inch in width, fitted with a wedge-style base that requires no separate socket locking mechanism.
The 97 is an ANSI-standardized single-filament bulb fitted with a BA15s bayonet base, rated at 12V and 13W. The BA15s designation indicates a single-contact bayonet cap with a 15mm base width.
The 97 bulb is noted as a variant of the 1156. While both share the BA15s bayonet base and single-filament construction, the 97 operates at a lower wattage than the standard 1156, which is rated at approximately 26.9W. This wattage difference makes the two types non-interchangeable without consideration of circuit load tolerances.
Both the 194 and 97 are recognized under ANSI standards applicable in the United States and Canada, indicating conformance to a defined set of electrical and physical performance criteria within those markets.
The front and rear side marker positions on the International A132 (1957-1958) draw from bulbs with notably different wattage ratings. The rear-mounted 97 at 13W draws significantly more power than the front-mounted 194 at 3.78W, reflecting the differing luminous output requirements between the two marker positions.