American Motors Ambassador License Plate Bulb Size

The American Motors Ambassador license plate light utilizes unique bulb size 194 and bulb size 67 components. Data for the specified vehicle covers the range from 1958 through 1974.

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
1974	194
1958-1971	67

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 8W.	67

Other Locations

Additional Notes

The American Motors Ambassador uses two distinct bulb types across its model years for the license plate position: the 67 and the 194.
The bulb 67 is the specified license plate bulb for the Ambassador across the 1958-1971 model years, with the sole exception of 1974.
The 1974 American Motors Ambassador uses a 194 bulb for the license plate position, which differs from the 67 bulb used in earlier model years.
The 67 bulb follows the ANSI standard recognized in both the United States and Canada, operates at 12 volts, and draws 8 watts.
The 67 bulb uses a BA15s bayonet base, which is a single-contact bayonet fitting, and is classified as a lower wattage variant of the 1156 bulb family.
The 194 bulb also follows the ANSI standard recognized in both the United States and Canada, operates at 12 volts, and draws 3.78 watts.
The 194 is a miniature wedge bulb of the T10 type, which uses a wedge-style base rather than a bayonet fitting, making it physically incompatible with sockets designed for the BA15s base of the 67 bulb.
The wattage difference between the two bulb types is notable: the 67 draws 8 watts while the 194 draws 3.78 watts, meaning the two are not electrically interchangeable despite both operating on 12-volt systems.