The Ford C8000 front side marker bulb uses 168 or 194 size, while the rear side marker bulb uses 168, 194, or 97 size. The replacement chart contains vehicle production years and bulb size specifications spanning 1980 to 1990.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford C8000 front side marker uses the 168 bulb across 1983-1990, while the 194 bulb was specified for 1980-1982, reflecting a change in bulb fitment at the 1983 model year boundary.
The 168 and 194 bulbs share the same T10 miniature wedge base and 12V operating voltage, which means they are physically interchangeable in terms of socket fit, though their wattage ratings differ at 4.9W and 3.78W respectively.
Despite the physical similarity between the 168 and 194, substituting one for the other alters the circuit load, as the difference in wattage reflects a difference in current draw that may affect compliance with original equipment specifications.
The rear side marker of the Ford C8000 shows greater variation across model years, with four distinct bulb types specified between 1980 and 1990.
The 1982 rear side marker is specified with the 97 bulb, a single-filament BA15s bayonet-base type rated at 13W. This bulb is a variant of the 1156 and is not interchangeable with the T10 wedge-base bulbs used in surrounding model years.
The 1980 rear side marker uses the 1895 bulb, a T5 miniature wedge type rated at only 0.9W and 12V. Its significantly lower wattage and smaller T5 form factor distinguish it from all other bulb types in these specifications.
All four bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada.
The rear side marker for 1983-1984 uses the 194 bulb, while 1985 through 1990 are not listed for that position, and 1981 uses the 168 bulb, indicating that the rear socket specification changed multiple times across the production run.
The T10 wedge base, shared by the 168 and 194 bulbs, is a common miniature format in which the bulb is retained by the tension of the socket contacts rather than a locking mechanism, making it a tool-free replacement type.
The 97 bulb specified for the 1982 rear side marker operates at 13W, a notably higher wattage than any other bulb in these specifications, which reflects its bayonet-base construction and larger filament design relative to the miniature wedge types.