Ford L9501 Back Up Light Bulb Size

The Ford L9501 back up light requires a bulb size of 1156 for the rear lighting assembly. Data for the specified component covers the range from 1997 to 1998.

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
1997-1998	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 bulb type specified for the Ford L9501 backup light across both available model years, 1997-1998.
The 1156 is an ANSI-standardized bulb recognized in the United States and Canada, meaning it conforms to a defined set of electrical and physical standards shared across many vehicle applications.
The 1156 operates on a 12-volt electrical system and draws 21 watts, which is typical for single-filament incandescent automotive bulbs used in backup light applications.
The 1156 uses a BA15s bayonet base, a single-contact mount where the bulb locks into its socket with a twist, as opposed to a screw or wedge-style fitting.
Because the 1156 is single-filament, it serves only one lighting function per socket, distinguishing it from dual-filament types such as the 1157, which would not be a direct substitute.