The Hino FD17 front and rear turn signal bulbs utilize either 1156 or 1157 bulb sizes depending on configuration. The replacement chart covers vehicle production spanning 1988 to 1991.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Hino FD17 uses two distinct bulb types across its turn signal positions: the 1156 and the 1157, both of which are ANSI-standardized bulbs common in the United States and Canada.
The 1156 is a single-filament bulb rated at 12V and 21W, fitted with a BA15s bayonet base. Its single filament means it serves one lighting function only.
The 1157 is a dual-filament bulb rated at 12V with two wattage outputs of 21W and 5W, fitted with a BAY15d bayonet base. The two filaments allow it to serve two lighting functions within a single housing.
The BA15s base of the 1156 and the BAY15d base of the 1157 are not interchangeable. The BAY15d base has two offset locating pins, while the BA15s base has a single pin, making physical substitution between the two types impossible without modification.
For the Hino FD17, the front turn signal position requires a 1156 bulb for model years 1989-1991.
The front turn signal for the 1988 model year requires a 1157 bulb, which differs from the 1989-1991 specification.
The rear turn signal position mirrors the front exactly across all listed years, with the 1156 specified for 1989-1991 and the 1157 specified for 1988.
Because the 1988 model year uses the dual-filament 1157 in both front and rear turn signal positions, a direct replacement with the single-filament 1156 used in later years would not be a compatible substitution for that year.