Ford Taunus front and rear turn signal bulbs utilized 1034 and 1154 sizes during the vehicle's production span. The replacement chart documents bulb specifications across the 1950 to 1957 model years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford Taunus turn signal specifications cover model years 1950 through 1957, with both front and rear positions sharing identical bulb requirements across all listed years.
Two bulb types appear across these specifications: the 1154 for model years 1950-1955, and the 1034 for model years 1956-1957, in both front and rear turn signal positions.
The 1154 is an ANSI-standardized dual-filament bulb rated at 6V or 12V, which reflects its origin as an older design intended to serve vehicles across different electrical system voltages.
The 1034 is an ANSI-standardized dual-filament bulb operating at 12V with a 21/5W output, indicating a fixed voltage requirement rather than the dual-voltage compatibility of the 1154.
Both the 1034 and 1154 use a BAY15d bayonet base, a double-contact offset-pin base type that physically prevents incorrect single-filament bulbs from being seated in the socket.
Both bulbs are described as variants of the 1157, a widely used automotive bulb standard, though the 1154 is the older variant and the 1034 is a closer relative to the modern 1157 specification.
Because the 1034 and 1154 share the same BAY15d base, physical fitment between the two is possible, but their differing voltage ratings make them electrically non-interchangeable without confirming the vehicle's system voltage.
The dual-filament design of both bulb types means a single bulb serves two lighting functions within one housing, typically combining a brighter turn signal filament with a lower-intensity running or parking light filament.