American Motors Marlin front and rear turn signal bulbs both use 1157 size bulbs for optimal lighting performance. The replacement chart covers 1965 to 1967 production 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 American Motors Marlin uses the 1157 bulb for both front and rear turn signals across the 1965-1967 model years.
The 1157 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 1157 is a dual-filament bulb, which allows it to serve two lighting functions within a single unit, typically combining a brighter filament for signaling with a dimmer filament for running light duty.
The bulb operates on a 12-volt electrical system and carries a wattage rating of 21W on the high filament and 5W on the low filament.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design that prevents incorrect insertion by ensuring the pins are not symmetrically positioned.
Because the front and rear turn signal positions on the Marlin share the same bulb type, a single 1157 bulb serves as a fitment for all four turn signal sockets across the vehicle.