The Mitsubishi Fuso FH uses 1156 bulb size for both front and rear turn signal applications. The replacement chart covers vehicle production spanning 1988 to 1998.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mitsubishi Fuso FH uses the 1156 bulb for both its front and rear turn signals across the 1988-1998 model years.
The 1156 is a single-filament bulb, meaning it is wired to perform one lighting function rather than sharing a circuit with a second filament for a combined stop/tail or similar dual-purpose role.
It operates on a 12-volt electrical system and draws 21 watts, which places it in the standard incandescent range for automotive turn signal applications.
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 the bulb's single-filament construction.
The 1156 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical parameters shared across many vehicle makes.
Because the front and rear turn signal positions on the Fuso FH share the same bulb type, a single 1156 unit is interchangeable between both locations on the vehicle.
The BA15s base is not interchangeable with the BA15d base, which is a dual-contact bayonet fitting used on two-filament bulbs. Substituting a BA15d bulb into a BA15s socket is not physically compatible.
The 1156 is sometimes sold under the trade designation P21W in markets outside North America. While the electrical ratings are equivalent, fitment should be confirmed against the BA15s base specification rather than trade name alone.