The Dodge C-3 front and rear turn signal bulb size specifications include 1034 and 1129 options for the illumination component. The replacement chart covers 1954 through 1956 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 C-3 uses two bulb types across its front and rear turn signal positions: the 1034 and the 1129, both of which are ANSI-standardized for the US and Canadian markets.
Both the 1034 and 1129 are dual-filament bulbs, meaning each unit contains two separate filaments that serve distinct lighting functions within a single housing.
The 1034 and 1129 share the same BAY15d bayonet base, a double-contact offset-pin base type commonly associated with dual-filament automotive bulbs.
Both bulbs operate at 12 volts with a 21/5W output, where the higher wattage filament serves the primary signal function and the lower wattage filament serves a secondary role.
The 1034 and 1129 are each described as variants of the 1157, a widely used dual-filament bulb in mid-20th century American vehicles.
The Dodge C-3 (1954-1955) uses the 1129 bulb in both the front and rear turn signal positions, with no distinction between the two locations for those model years.
The 1034 bulb replaced the 1129 in the Dodge C-3 for the 1956 model year, applying equally to both the front and rear turn signal positions.
Because the 1034 and 1129 share the same base type and electrical ratings, their physical and electrical compatibility is closely related, though they remain distinct ANSI part numbers and are not formally listed as interchangeable in these specifications.