American Motors Ambassador high beam headlight bulbs measure H5001 in size, while low beam headlight bulbs measure H5006 in size. The replacement chart covers vehicle production spanning 1958 to 1974 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 American Motors Ambassador uses the H5001 sealed beam unit for the high beam headlight across all listed model years, spanning 1958-1974.
The H5001 is a 4-inch square sealed beam unit operating at 12V. It conforms to the ANSI standard recognized in both the United States and Canada. Because it is a sealed beam design, the entire unit is replaced rather than an internal filament or bulb.
The low beam headlight on the Ambassador is fitted with the H5006 sealed beam unit across the same 1958-1974 model year range.
The H5006 is a 5.75-inch round sealed beam unit, also rated at 12V and built to the same ANSI standard as the H5001. Like the H5001, the H5006 is replaced as a complete unit.
The H5001 and H5006 are not interchangeable with each other. The high beam position requires the 4-inch square H5001, while the low beam position requires the 5.75-inch round H5006. Substituting one for the other is not compatible with the intended fitment.
The consistent use of both the H5001 and H5006 across the entire 1958-1974 span indicates that no headlight bulb specification change occurred for the Ambassador throughout its production run as listed.