Hino FA14 headlight bulbs utilize H4651 size for high beam and H4656 or H4652 sizes for low beam applications. The replacement chart covers 1989 to 1991 vehicle production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Hino FA14 uses sealed beam headlight units across all listed model years (1989-1991), meaning neither the high beam nor low beam positions accept replaceable bulbs. When a unit fails, the entire sealed assembly requires replacement.
All sealed beam types fitted to the FA14 conform to ANSI standards recognized in both the United States and Canada, and all operate on a 12V electrical system.
The H4651 and H4656 are both 4x6-inch rectangular sealed beam units under ANSI standardization. The H4652 is a variant of the H4651, sharing the same 4x6-inch rectangular sealed beam format.
The high beam position on the FA14 uses the H4651 unit consistently across all three listed model years (1989-1991), indicating no change in high beam specification during that period.
The low beam position on the Hino FA14 is not uniform across all listed years. The 1991 model year uses the H4656, while the 1989-1990 model years use the H4652. These are distinct part numbers and are not interchangeable despite sharing the same physical format.
Because the H4652 is described as a variant of the H4651, the two share a close technical relationship, though they carry separate ANSI designations and serve different lighting functions within the FA14's headlight system.