Ford B-700 front and rear side marker bulbs utilize 194 and 168 bulb sizes depending on location and model configuration. The replacement chart covers vehicle production spanning 1980 to 1994 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 B-700 uses the 194 bulb for the front side marker across all listed model years, spanning 1980-1994.
The 194 is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 3.78W, recognized in both the US and Canada.
The Ford B-700 rear side marker also uses the 194 bulb for most listed years, specifically 1983-1984 and 1989-1994.
The 1980 rear side marker on the Ford B-700 takes the 168 bulb rather than the 194 used in other years.
The 168 bulb shares the same T10 miniature wedge form factor and 12V operating voltage as the 194, but draws more power at 4.9W compared to the 194's 3.78W.
Because the 194 and 168 share the T10 wedge base, they are physically interchangeable in terms of socket fit, though their wattage ratings differ.
Substituting a 168 for a 194, or vice versa, in a socket designed for one or the other may result in a brightness level that does not match the original specification for that position.
Both the 194 and 168 carry ANSI standardization, meaning their electrical and physical characteristics conform to a defined industry specification rather than being proprietary to a single manufacturer.