The Dodge 440 front and rear turn signal bulbs both utilize a 1034 size bulb for proper operation. The replacement chart covers vehicle production spanning 1963 to 1964.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1034 bulb is the sole bulb type specified for the Dodge 440 across all listed positions and years, appearing in both the front and rear turn signal applications for 1963-1964.
The 1034 is a dual-filament bulb, meaning it carries two separate filaments within a single envelope, allowing it to serve two distinct lighting functions from one unit.
The 1034 operates at 12 volts with a 21/5W output rating, where the higher wattage filament handles the brighter turn signal function and the lower wattage filament handles a secondary function such as running or parking light duty.
The 1034 uses a BAY15d bayonet base, which is an offset-pin bayonet mount designed to ensure the bulb is inserted in only one rotational orientation, preventing incorrect filament alignment.
The 1034 is an ANSI-standardized bulb recognized in both the United States and Canada, indicating it conforms to a defined set of electrical and physical specifications shared across those markets.
The 1034 is described as a variant of the 1157, a widely used automotive bulb. While the two share a similar design, they are not confirmed as interchangeable in these specifications, and substituting one for the other without verification of electrical compatibility could affect circuit behavior.