American Motors Hornet Map Light Bulb Size

The American Motors Hornet map light requires bulb size 561 or 194 depending on the specific application. Data for the bulb sizes covers the range from 1970 to 1977.

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
1975-1977	561
1971	194
1970	561

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	561
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

Other Locations

Additional Notes

The 561 is the most frequently specified map light bulb across the American Motors Hornet listings, appearing in the 1970 and 1975-1977 model years.
The 561 is a festoon-type bulb with a 44mm length and end-cap contacts, operating at 12V and 12W under the ANSI standard recognized in both the US and Canada.
Festoon bulbs make contact at both ends of the tube rather than through a base, which is a defining characteristic of the 561's physical design.
The 1971 American Motors Hornet departs from the festoon format, specifying instead the 194 bulb for its map light.
The 194 is a miniature wedge bulb of the T10 type, operating at 12V but drawing only 3.78W, making it considerably lower in wattage than the 561.
The wedge base of the 194 is retained in its socket by friction rather than by end-cap contacts, representing a fundamentally different mounting method from the 561.
Because the 561 and 194 use incompatible base types, one is not a direct physical substitute for the other despite both operating on 12V systems.
Both bulb types conform to ANSI standards applicable in the US and Canada, indicating standardized electrical and physical tolerances for each type.