American Motors Rambler Back Up Light Bulb Size

The American Motors Rambler back up light requires bulb sizes 1156, 1073, and P21W depending on the specific application. Data for the bulb sizes covers the range from 1958 to 1969.

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
1969	1156
1959-1960	1073
1958	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	1073

Other Locations

Additional Notes

The American Motors Rambler backup light specifications cover four model years across two distinct bulb types: the 1156 and the 1073.
Both the 1156 and 1073 are ANSI-standard bulbs recognized in the US and Canada, each operating at 12 volts with a single filament and a BA15s bayonet base.
The BA15s bayonet base is a single-contact fitting, which is consistent with the single-filament design of both bulb types listed in these specifications.
The primary difference between the two bulbs is wattage. The 1156 is rated at 21W, while the 1073 is rated at 13W, making the 1073 a lower-output variant of the 1156.
Although the 1156 and 1073 share the same BA15s base and voltage rating, their wattage difference means they are not interchangeable without affecting light output. The 1073 produces noticeably less light than the 1156.
The American Motors Rambler (1969) uses the 1156 bulb for the backup light, as does the 1958 model year.
The 1959-1960 Rambler uses the 1073 bulb, which draws less power than the 1156 fitted to the 1958 and 1969 model years.