The Ford F-800 front and rear side marker bulb sizes consist of 194 and 168 specifications, with the front utilizing a single bulb size designation. The replacement chart covers vehicle production spanning 1980 to 1999, detailing bulb size specifications across the model's manufacturing period.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford F-800 front side marker positions across the 1980-1999 model years all share a single bulb specification, the 194, a miniature wedge type in the T10 form factor rated at 12 volts and 3.78 watts.
The 194 bulb follows the ANSI standard recognized in both the United States and Canada, placing it within a widely adopted classification system for miniature automotive lighting.
The rear side marker on the Ford F-800 uses the 194 bulb for the 1981-1998 model years, with the same T10 wedge base and 12-volt, 3.78-watt electrical rating as the front position.
The 1980 rear side marker position departs from the otherwise uniform specification by requiring a 168 bulb rather than a 194. The 168 is also a T10 miniature wedge type operating at 12 volts but carries a higher wattage of 4.9 watts.
Although the 194 and 168 bulbs share the same T10 wedge base, their wattage ratings differ. The 168 draws approximately 1.12 watts more than the 194, which means the two types are not electrically interchangeable without accounting for that difference.
The rear side marker entries for 1986 and 1985 carry a Cowl designation, indicating that the 194 bulb specification for those years applies specifically to a cowl-mounted marker position rather than a standard body-side location.