Plymouth Concord front and rear turn signal bulbs both utilize a 1154 size bulb for proper operation. The replacement chart covers vehicle production spanning 1951 to 1952.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Plymouth Concord uses the 1154 bulb across both its front and rear turn signal positions for the 1951-1952 model years.
The 1154 is a dual-filament bulb, meaning it carries two separate filaments within a single envelope, allowing it to serve more than one lighting function simultaneously.
It uses a BAY15d bayonet base, a two-pin offset base design that physically prevents incorrect insertion by positioning the two pins at different heights on the base.
The 1154 is rated for both 6V and 12V electrical systems, reflecting its origin in an era when the automotive industry was transitioning between those two voltage standards.
The 1154 is classified as an older variant of the more widely known 1157 bulb, sharing a similar dual-filament, BAY15d configuration but predating the standardization of the later type.
The 1154 carries ANSI standardization and is recognized in both the United States and Canada under that designation.
The shared bulb specification across both the front and rear turn signal positions on the Plymouth Concord means a single bulb type serves all four turn signal sockets on the vehicle.