Ford Elite Back Up Light Bulb Size

The Ford Elite back up light requires bulb size 1156 or P21W depending on the specific configuration of the vehicle. Data for the bulb sizes covers the range from 1975 to 1976.

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
1975-1976	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 Ford Elite backup light across both available model years, 1975-1976.
The 1156 operates on a 12-volt electrical system and draws 21 watts, placing it in the standard incandescent range for single-circuit automotive lighting applications.
The 1156 uses a single filament, which is consistent with backup light use, as that function requires only one brightness level with no secondary circuit for dimming or signaling.
The base type for the 1156 is the BA15s bayonet mount, a single-contact design where the "s" designation indicates a single pin offset, distinguishing it from the dual-contact BA15d base used in two-filament bulbs.
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 manufacturers.
Because the BA15s base is a single-contact bayonet fitting, it is not interchangeable with visually similar bulbs that use a BA15d base, such as the 1157, despite the housings appearing nearly identical.