Ford Capri front turn signal bulbs use 1157 size while rear turn signal bulbs use 1156 size. The replacement chart covers 1962 to 1964 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford Capri uses two distinct bulb types across its front and rear turn signal positions for the 1962-1964 model years: the 1157 at the front and the 1156 at the rear.
The 1157 is a dual-filament bulb, meaning it carries two separate filaments within a single envelope, allowing it to serve two lighting functions at different wattages.
The 1157 operates at 12 volts with a 21W/5W output, where the 21W filament handles the turn signal function and the 5W filament serves a secondary purpose such as parking or running light duty.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design that physically prevents incorrect installation of a single-filament bulb in its place.
The 1156 is a single-filament bulb rated at 12 volts and 21W, dedicated solely to the rear turn signal function on the Ford Capri across the listed model years.
The 1156 uses a BA15s bayonet base, a single-pin design that is not interchangeable with the BAY15d base of the 1157, despite the two bulbs sharing a similar physical profile.
Both the 1157 and 1156 are ANSI-standardized bulbs recognized across the United States and Canada, placing them within a widely available and consistent specification framework.
Because the BAY15d and BA15s bases differ in pin configuration, the 1157 and 1156 are not interchangeable, and substituting one for the other in a given socket is not possible without modification.