The Ford F-8000 uses a 194 bulb size for both front and rear side marker applications. The replacement chart covers 1983 to 1987 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 194 bulb is the sole bulb type across all side marker positions listed for the Ford F-8000, appearing in both front and rear applications.
The 194 is classified as an ANSI-standard miniature wedge bulb, designated T10, and is recognized under both US and Canadian standards.
The T10 wedge base design means the bulb is held in place by friction rather than a bayonet or screw mechanism, requiring no locking rotation during installation.
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 front side marker on the Ford F-8000 uses the 194 bulb across the 1983-1984 and 1987 model years.
The rear side marker position shares the same 194 bulb size as the front for the 1983-1984 model years, indicating interchangeability between front and rear sockets in those years.
Because the 194 is an ANSI-standardized type, it is produced by multiple manufacturers to a common specification, meaning physical and electrical compatibility is governed by that standard rather than by brand.
The T10 wedge form factor is widely used across the automotive industry, and aftermarket variants including LED replacements are commonly available in this base type, though electrical compatibility with the original 12V/3.78W rating may vary by replacement type.