The Ford B-800F front and rear side marker bulb size measures 194 for both locations on this commercial vehicle model. The replacement chart covers 1995 to 1998 production years with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford B-800F uses the 194 bulb for both its front and rear side marker positions across the 1995-1998 model years.
The 194 is a miniature wedge-type bulb, classified under the T10 form factor, which refers to its tubular shape with a wedge base that connects directly into a socket without a separate metal base or pins.
The 194 bulb operates at 12 volts with a power draw of 3.78 watts, placing it in the low-wattage range typical of marker and courtesy lighting applications.
The 194 carries ANSI standardization recognized in both the United States and Canada, meaning its physical and electrical characteristics conform to a defined industry specification rather than a proprietary design.
Because the Ford B-800F uses the same 194 bulb size for all four side marker positions, front and rear units are interchangeable with one another from a bulb standpoint.
The T10 wedge base format of the 194 bulb is not compatible with bayonet or screw-base sockets, so the receiving socket in the vehicle must be a wedge-type holder for proper fitment.