Hino FB14 front and rear turn signal bulbs utilize P21W and 1157 bulb sizes for replacement applications. The replacement chart covers vehicle production spanning 1987 to 1991 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 FB14 turn signal bulbs across the listed years fall into two distinct types: the P21W, an ECE-standard single-filament bulb, and the 1157, an ANSI-standard dual-filament bulb.
The P21W operates at 12V with a 21W output and uses a BA15s bayonet base, which has a single contact pin. It conforms to ECE regulations used in Europe and other worldwide markets.
The 1157 also operates at 12V but carries a dual-filament design rated at 21W and 5W, using a BAY15d bayonet base. The BAY15d base features two offset pins to prevent incorrect installation.
Because the BA15s and BAY15d bases are physically different, the P21W and 1157 bulbs are not interchangeable without socket modification.
The Hino FB14 used the 1157 bulb for both front and rear turn signals in 1987-1988.
From 1989-1991, both the front and rear turn signal positions transitioned to the P21W bulb.
The front and rear turn signal positions share the same bulb type for every model year listed, meaning no mixed fitment exists between the two positions within a single year.
The shift from the ANSI-standard 1157 to the ECE-standard P21W reflects a change in the regulatory or market specification applied to the FB14 from the 1988 to the 1989 model year.