International Scout II front side marker bulbs use 194 size while rear side marker bulbs use 97 size. The replacement chart covers 1971 to 1980 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 Scout II uses the 194 bulb for the front side marker position across all listed model years, spanning 1971-1980.
The 194 is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12 volts and 3.78 watts.
The T10 wedge base of the 194 bulb requires no locking mechanism for retention, as the wedge shape itself holds the bulb within its socket.
The rear side marker position on the International Scout II lists the 97 bulb for 1971-1973, with a Light Duty designation applied to all three of those years.
The 97 is an ANSI-standard single-filament bulb with a BA15s bayonet base, rated at 12 volts and 13 watts, making it significantly higher in wattage than the 194 used at the front.
The BA15s bayonet base of the 97 bulb uses a single contact pin, which distinguishes it from dual-contact bayonet bases and affects socket compatibility.
The 97 bulb is classified as a variant of the 1156, meaning the two share a base type and general construction, though they are not identical and are not interchangeable without confirming voltage and wattage tolerances for the specific socket.
The front and rear side marker positions on the Scout II use bulbs from different base families, the T10 wedge and the BA15s bayonet, meaning the two positions do not share a common bulb and sockets are not interchangeable between them.