American Motors Eagle Back Up Light Bulb Size

The American Motors Eagle back up light utilizes 1156 and P21W bulb sizes according to the provided data. Information for the specified vehicle covers the period from 1980 through 1988.

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
1983-1988	1156
1980-1981	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 back up light bulb type specified for the American Motors Eagle across all listed model years.
The 1156 is a single-filament bulb, meaning it serves one lighting function rather than combining two, such as stop and tail duties, into a shared unit.
It operates on a 12-volt electrical system and draws 21 watts, which is typical for incandescent automotive reverse lighting applications.
The 1156 uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin, distinguishing it from the dual-contact BA15d variant used in other bulb types.
The 1156 conforms to ANSI standards recognized in both the United States and Canada, placing it within a widely distributed specification for North American vehicles.
The American Motors Eagle used the 1156 for back up lighting across the 1980-1981 and 1983-1988 model years.
Because the BA15s base accepts only single-contact bayonet fittings, substituting a dual-contact bayonet bulb such as the 1157 would result in an incompatible fitment despite the physical similarity of the socket housing.