The Dodge B-3 front and rear turn signal bulbs both utilize a 1129 bulb size specification. The replacement chart covers 1951 to 1952 vehicle production years with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Dodge B-3 uses the 1129 bulb across both its front and rear turn signal positions for the 1951-1952 model years.
The 1129 is an ANSI-standardized bulb type recognized in both the United States and Canada.
The 1129 is a dual-filament bulb, meaning it carries two separate filaments within a single envelope, allowing it to serve more than one lighting function.
It operates on a 12-volt electrical system and draws 21 watts on its primary filament and 5 watts on its secondary filament.
The 1129 uses a BAY15d bayonet base, which is an offset twin-pin base that prevents incorrect insertion by positioning its two pins at different heights.
The 1129 is noted as a variant of the 1157 bulb type, indicating a close relationship in base design and general construction, though the two are not necessarily interchangeable without verification of voltage and wattage compatibility with the vehicle's circuit.