Ford C7000 front side marker bulbs use 168 or 194 size, while rear side marker bulbs use 194, 168, or 97 size. The replacement chart covers 1971 to 1986 vehicle production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford C7000 front side marker uses the 168 bulb for 1983-1986 and the 194 bulb for 1980-1982 and 1971.
The Ford C7000 rear side marker uses the 194 bulb for 1983-1984, the 168 bulb for 1980-1982, and the 97 bulb for 1971.
The 168 and 194 are both ANSI-standard miniature wedge bulbs sharing the T10 form factor and a 12V operating voltage, though they differ in wattage at 4.9W and 3.78W respectively.
Because the 168 and 194 share the same T10 wedge base, they are physically interchangeable in the socket, but their wattage difference means one cannot be substituted for the other without altering the circuit's designed power draw.
The 97 bulb, used in the 1971 rear side marker position, operates on a BA15s single-contact bayonet base and draws 13W at 12V, making it electrically and physically incompatible with the T10 wedge sockets used in other model years.
The 97 bulb is noted as a variant of the 1156, which is a common single-filament bayonet bulb, though the 97 carries a significantly lower wattage than the standard 1156 rating of approximately 26.9W.
All three bulb types across these specifications conform to ANSI standards recognized in both the United States and Canada.