Ford L8000 front side marker bulbs use 1895 or 168 size, while rear side marker bulbs use 904, 194, or 1895 size. The replacement chart covers 1981 to 1988 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 L8000 front side marker positions use two bulb types across the 1981-1988 model years: the 1895 and the 168. The 1895 is the more frequently specified of the two, covering 1981-1982 and 1985-1988, while the 168 appears only in 1983-1984.
The 1895 bulb is an ANSI-standard miniature wedge type in a T5 envelope, rated at 12V and 0.9W. Its T5 form factor is notably smaller than the T10 bulbs used elsewhere in the L8000 side marker system.
The 168 bulb is an ANSI-standard miniature wedge type in a T10 envelope, rated at 12V and 4.9W. Despite sharing the T10 form factor with the 194 and 904 bulbs, the three are not interchangeable due to differing wattage ratings.
The rear side marker positions on the Ford L8000 draw from four distinct bulb sizes across the 1981-1988 span: the 904, 194, 1895, and 168. This variety means the rear position has less consistency across model years than the front.
The 194 bulb is an ANSI-standard T10 miniature wedge rated at 12V and 3.78W. It is specified for the rear side marker in 1982-1984 and 1987, making it the most frequently used bulb in that position.
The 904 bulb is an ANSI-standard T10 miniature wedge rated at 12V and 8W. It is the highest-wattage bulb in the L8000 side marker specifications and is used in the rear position for 1981 and 1988.
Although the 168, 194, and 904 bulbs all share the T10 wedge form factor, their wattage values of 4.9W, 3.78W, and 8W respectively indicate they are not electrically equivalent. Substituting one for another in a socket designed for a specific wattage risks improper illumination or circuit stress.
The T5 envelope of the 1895 bulb is physically smaller than the T10 envelope shared by the 168, 194, and 904 bulbs. A T5 and T10 wedge base are not dimensionally compatible, so the 1895 cannot be seated in a socket designed for T10 bulbs.
All four bulb types in the L8000 side marker specifications conform to ANSI standards recognized in both the United States and Canada, indicating consistent regulatory compliance across the full range of specified bulbs.
The rear side marker of the 1986 Ford L8000 uses the 1895, a T5 bulb, while the surrounding model years in that position use T10 variants. This makes 1986 the only rear side marker year to share its bulb type with the front side marker positions of 1981-1982 and 1985-1988.