The Dodge A100 Truck front turn signal requires a 1156, 199, or 1034 bulb size, while the rear turn signal uses a 1156 or 1034 bulb size. The replacement chart covers 1964 to 1970 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1156 bulb is the most frequently specified type across the Dodge A100 Truck's turn signal data, appearing in both front and rear positions for the 1966-1970 model years, with the exception of the 1968 front turn signal.
The 1156 is a single-filament bulb rated at 12V and 21W, fitted with a BA15s bayonet base, and produced to ANSI standards for the US and Canadian markets.
The 199 bulb shares the same BA15s bayonet base, voltage, and wattage rating as the 1156 and is classified as a variant of it, though the two carry distinct ANSI designations.
The 199 bulb is specified exclusively for the 1968 Dodge A100 Truck front turn signal, while the rear turn signal for that same year uses the 1156.
The 1034 bulb differs fundamentally from the 1156 and 199 in that it carries two filaments rather than one, with a rated output of 21W on the primary filament and 5W on the secondary.
The dual-filament design of the 1034 uses a BAY15d bayonet base, which is physically distinct from the BA15s base found on the 1156 and 199, making the two bulb types non-interchangeable despite sharing a 12V operating voltage.
The 1034 is classified as a variant of the 1157 and conforms to ANSI standards for the US and Canadian markets.
For the 1964-1965 Dodge A100 Truck, the 1034 bulb is specified for both the front and rear turn signal positions, meaning the same bulb type served both functions during those model years.