The Plymouth Arrow front and rear turn signal bulbs both utilize a 1157 bulb size. The replacement chart covers vehicle production spanning 1976 to 1980.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Plymouth Arrow uses the 1157 bulb for both front and rear turn signals across the 1976-1980 model years.
The 1157 is a dual-filament bulb, meaning it serves two lighting functions within a single unit, operating at 21 watts on the high filament and 5 watts on the low filament.
The 1157 operates on a 12-volt electrical system, consistent with standard automotive electrical architecture of that era.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design that prevents incorrect installation by ensuring only one rotational orientation allows the bulb to seat properly.
The 1157 conforms to ANSI standards, meaning its physical and electrical characteristics are governed by a recognized North American specification applicable in both the United States and Canada.
Because the same 1157 bulb is specified for both the front and rear turn signal positions on the Plymouth Arrow, a single bulb type covers all four turn signal sockets on the vehicle.
The dual-filament nature of the 1157 allows the lower 5W filament to function as a parking or running light while the higher 21W filament activates for the turn signal flash, a common arrangement in combined-function lamp housings.