The American Motors American front turn signal bulb size measures 1157, 1034, or 1034NA, while the rear turn signal bulb size measures 1157 or 1034. The replacement chart covers vehicle production years spanning 1958 through 1968.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The American Motors American uses two distinct bulb types across its model years for turn signal applications: the 1157 and the 1034, along with a natural amber variant of the 1034 designated 1034NA.
All three bulb types found in these specifications share the BAY15d bayonet base, operate at 12 volts, and carry a dual-filament configuration rated at 21W and 5W respectively.
The dual-filament design allows a single bulb to serve two lighting functions simultaneously, typically combining the turn signal function with a lower-intensity running or parking light on the same circuit.
The 1034 and 1034NA are both classified as variants of the 1157, meaning they share the same base type and general electrical characteristics while differing in other respects such as glass coating.
The 1034NA variant features natural amber glass, which produces a colored output without the use of an amber-tinted lens on the vehicle itself.
For the American Motors American, the front turn signal positions for 1958-1960 are specified with the 1034NA, while the rear positions for those same years use the standard 1034, indicating the two positions are not interchangeable by specification despite sharing the same base type.
From 1961-1963, both front and rear turn signal positions on the American use the 1034, with no amber glass variant specified for either position.
A bulb transition occurs between the 1963 and 1964 model years, where both front and rear turn signal positions shift from the 1034 to the 1157.
From 1964-1968, the American uses the 1157 for both front and rear turn signal positions, making it the bulb type associated with the greater portion of the model range covered in these specifications.
Although the 1034 and 1157 share the BAY15d base, they are distinct ANSI-designated bulbs, and substituting one for the other without confirming electrical compatibility with the vehicle's specific socket and circuit is not supported by these specifications.