Hino FF19 Back Up Light Bulb Size

The Hino FF19 back up light utilizes a 1156 bulb size for the specific lighting component located at the rear of the vehicle. Data for the bulb size covers the range from 1989 to 1991.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1989-1991	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The 1156 is the sole bulb type listed for the Hino FF19 back up light across the 1989-1991 model years.
The 1156 is an ANSI-standardized bulb recognized across the United States and Canada, meaning it conforms to a defined set of electrical and physical parameters shared by compliant manufacturers.
It operates on a 12-volt electrical system and draws 21 watts, which is typical of incandescent single-filament automotive bulbs used in non-lighting-critical applications such as reverse lamps.
The 1156 uses a BA15s bayonet base, where "BA15s" denotes a single-contact bayonet fitting with a 15mm base width. The single-contact design corresponds directly to its single-filament construction, as only one circuit connection is required.
Because the 1156 is a single-filament bulb, it serves one dedicated function per socket. In the context of the Hino FF19, that function is the back up light, which activates when reverse gear is engaged.
The BA15s base is not interchangeable with the BA15d base, which is a dual-contact variant used for twin-filament bulbs. Substituting a BA15d bulb into a BA15s socket is not physically compatible without modification.