The American Motors Custom uses H5001 bulb size for high beam headlight and H5006 bulb size for low beam headlight applications. The replacement chart covers 1961 to 1962 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H5001 and H5006 are sealed beam units, meaning the lens, reflector, and filament are fused into a single glass assembly. When the filament fails, the entire unit is replaced rather than an internal bulb.
The H5001 is a 4-inch square sealed beam unit operating at 12 volts, conforming to ANSI standards recognized in both the United States and Canada.
The H5006 is a 5.75-inch round sealed beam unit, also rated at 12 volts and built to the same ANSI standard applicable in the United States and Canada.
The American Motors Custom uses the H5001 for high beam and the H5006 for low beam across both the 1961-1962 model years, with no variation between those years.
The H5001 and H5006 are physically distinct units. The square profile of the H5001 and the round profile of the H5006 make the two types non-interchangeable with each other.
Both sealed beam types share the same 12-volt operating requirement, which is consistent with the standard 12-volt electrical systems found in passenger vehicles of that era.
ANSI standardization of both units means that replacement sealed beams meeting the H5001 or H5006 designation from any compliant manufacturer are expected to fit the same housing without modification.