Lincoln Capri front and rear turn signal bulbs utilized 1034 and 1154 size specifications. The replacement chart covers 1952 through 1959 production data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Lincoln Capri uses two bulb types across its turn signal specifications: the 1034 and the 1154, both of which are dual-filament bulbs sharing the BAY15d bayonet base.
The BAY15d base is an offset twin-contact bayonet fitting, which physically positions the two filaments for separate low and high-wattage functions within a single bulb housing.
Both the 1034 and 1154 are ANSI-standardized bulbs recognized in the US and Canadian markets.
The Lincoln Capri (1956-1959) uses the 1034 bulb for both front and rear turn signals, operating at 12V with a 21/5W dual-filament output.
The 1952-1955 Capri uses the 1154 bulb for both front and rear turn signals, an older dual-filament variant rated for 6V or 12V operation.
The 1034 is described as a variant of the 1157, a widely used automotive bulb, though the 1034 carries its own distinct ANSI designation and wattage rating.
The 1154 is described as an older variant of the 1157, reflecting its earlier design origin relative to the 1034 and the later standardized 1157.
Despite sharing the same BAY15d base, the 1034 and 1154 are not confirmed as interchangeable, as their voltage ratings and filament specifications differ.
The front and rear turn signal positions on the Capri use identical bulb types within any given model year, with no positional variation in the specifications.