The Hino FB1715 uses an H4651 bulb size for high beam headlight and H4656 or H4652 bulb sizes for low beam headlight applications. The replacement chart covers 1993 to 1995 vehicle 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 Hino FB1715 uses sealed beam headlight units across its 1993-1995 model years, with H4651, H4652, and H4656 being the bulb types specified for high and low beam positions.
All three sealed beam types conform to ANSI standards recognized in both the United States and Canada, and all operate on a 12V electrical system.
Each of these units follows the 4x6-inch rectangular sealed beam format, a standardized form factor in which the lens, reflector, and filament are fused into a single glass envelope.
Because these are sealed beam units rather than bulb-and-housing assemblies, the entire unit is replaced when the light fails, rather than just an internal bulb.
The H4651 is specified for the high beam headlight position on the Hino FB1715 across all three model years, 1993-1995.
The low beam headlight position uses the H4656 for the 1994-1995 model years, while the 1993 model year uses the H4652 instead.
The H4652 is described as a variant of the H4651. Despite sharing the same 4x6-inch rectangular sealed beam format and 12V rating, the two are not specified interchangeably across all positions, as the H4651 is designated for high beam use and the H4652 for low beam use in the 1993 model year.
The H4656 and H4652 occupy the same low beam position in different model years but are distinct part numbers and are not listed as interchangeable with each other.