The Volvo 144 front and rear turn signal bulbs both utilize a 1156 size bulb for proper operation. The replacement chart covers vehicle production spanning 1967 to 1974.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Volvo 144 uses the 1156 bulb for both front and rear turn signals across all listed model years, spanning 1967-1974.
The 1156 is an ANSI-standardized bulb type, meaning its physical and electrical specifications conform to a defined North American standard used across the United States and Canada.
The 1156 operates at 12 volts and 21 watts, which is consistent with standard automotive electrical systems of that era.
As a single-filament bulb, the 1156 is dedicated to one lighting function per socket, distinguishing it from dual-filament types that serve two functions, such as combined stop and tail lighting.
The 1156 uses a BA15s bayonet base, where "BA15s" denotes a single-contact bayonet fitting with a 15mm base width. The single-contact design corresponds directly to the bulb's single-filament construction.
Because the Volvo 144 uses the same 1156 bulb in all four turn signal positions, front and rear sockets share the same bulb specification, which simplifies parts sourcing.
The 1156 and the 1157 are visually similar bulbs with the same BA15s-style base family, but the 1157 uses a dual-filament, dual-contact base (BA15d) and is not interchangeable with the single-contact 1156 socket used in the Volvo 144.