Isuzu FTR Back Up Light Bulb Size

The Isuzu FTR back up light utilizes a 1156 bulb size for illumination purposes within the rear lighting assembly. Available information covers a specific range of production spanning from 1988 through 2011.

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
2002-2011	1156 (Tilt Cab)
1996-2001	1156
1988-1995	1156 (Heavy Duty)

Bulb Specifications

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

Other Locations

Additional Notes

The Isuzu FTR uses the 1156 bulb for the back up light position across all model years listed in the specifications, spanning 1988-2011.
The 1156 is an ANSI-standard bulb recognized in both the United States and Canada, operating at 12 volts and 21 watts with a single filament.
A single-filament design means the 1156 serves one lighting function only, which is consistent with its role as a dedicated back up light bulb.
The 1156 uses a BA15s bayonet base, a single-contact bayonet mount where the "s" denotes a single contact pin offset to one side, allowing only one insertion orientation.
From 2002-2011, the specifications carry a Tilt Cab designation, indicating the 1156 fitment applies specifically to that cab configuration during those years.
From 1988-1995, the specifications carry a Heavy Duty designation, indicating the 1156 fitment applies specifically to that variant during those years.
The 1996-2001 model years carry no sub-model designation in the specifications, listing the 1156 without a cab or duty qualifier.
Because the BA15s base is a single-contact design, it is not interchangeable with the BA15d base, which carries two contact pins and is used on dual-filament bulbs such as the 1157.