Ford L800 front and rear side marker bulbs utilize 1895, 168, and 194 bulb sizes across different positions on the vehicle. The replacement chart covers 1980 through 1985 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 Ford L800 side marker system across the 1980-1985 model years draws exclusively from four bulb types: 1895, 168, 194, and 904. All four conform to ANSI standards recognized in both the United States and Canada.
All four bulb types share the miniature wedge base design, which uses a plastic wedge-shaped base to make direct contact with the socket rather than relying on metal pins or bayonet fittings. This construction is common in low-current automotive marker applications.
Three of the four bulb types, the 168, 194, and 904, share the T10 envelope designation. T10 refers to a tubular glass envelope with a nominal width of 10 eighths of an inch. Despite sharing this envelope size, these three bulbs carry different wattage ratings and are not interchangeable.
The 904 bulb carries the highest wattage rating among the four types at 8W, while the 194 operates at 3.78W and the 168 at 4.9W. Although all three are T10 wedge bulbs operating at 12V, substituting one for another would alter the intended light output of the marker position.
The 1895 bulb uses a T5 envelope, which is narrower than the T10 shared by the other three types. Its rated output is 0.9W at 12V, making it the lowest-wattage bulb specified across the entire Ford L800 side marker application set.
The front side marker position on the Ford L800 shows variation across all six model years covered, with the 194 used in 1980 and 1982, the 1895 used in 1981 and 1985, and the 168 used in 1983-1984.
The rear side marker position on the Ford L800 similarly varies across the same period, with the 168 used in 1980-1981, the 194 used in 1982 and 1985, and the 904 used in 1983-1984.
The 1983-1984 model years share identical bulb fitments in both the front and rear side marker positions, with the 168 at the front and the 904 at the rear. This is the only consecutive pairing in the specifications where both positions carry the same bulb assignments across two years.
The T5 envelope of the 1895 bulb is physically narrower than the T10 envelope used by the 168, 194, and 904 types. A T10 socket is not designed to retain a T5 wedge bulb securely, which makes cross-substitution between the 1895 and any T10 type a fitment concern beyond wattage differences alone.
The 194 bulb appears in both the front and rear side marker positions across different model years of the Ford L800, specifically at the front in 1980 and 1982 and at the rear in 1982 and 1985. It is the only bulb type specified for both positions within this application set.