Eagle Premier Back Up Light Bulb Size

The Eagle Premier back up light uses 1156 and P21W bulb sizes for the rear lighting system. Data for the specified components covers the period from 1988 through 1992.

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
1988-1992	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 back up light across all model years of the Eagle Premier covered in these specifications.
The 1156 operates on 12 volts with a 21-watt rating, placing it in the standard single-filament category used for directional or single-function lighting applications such as reverse lights.
The 1156 uses a BA15s bayonet base, which is a single-contact bayonet fitting. This base type is not interchangeable with the BA15d double-contact bayonet base used on dual-filament bulbs such as the 1157.
The 1156 carries ANSI standardization applicable in both the United States and Canada, meaning the bulb designation refers to a consistent specification across both markets.
The Eagle Premier (1988-1992) uses the 1156 for its back up light throughout the entire production span reflected in these specifications.
Because the 1156 is a single-filament bulb, substituting a dual-filament bulb with a visually similar base is not a compatible replacement, as the contact configuration differs.