The Ford Festiva brake light requires a 1157 bulb size for proper installation and function within the lighting assembly. Data for the specified component covers the period from 1988 through 1993.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford Festiva uses the 1157 bulb for its brake lights across the full 1988-1993 model range.
The 1157 is a dual-filament bulb operating at 12V with a 21W/5W output, meaning the two filaments serve separate functions at different wattages within the same housing.
Its BAY15d bayonet base features offset pins, a design that prevents incorrect insertion by ensuring the bulb can only be seated in one orientation.
The center high mount stop light on the Ford Festiva (1988-1993) takes the 1156 bulb rather than the 1157 used in the standard brake light positions.
The 1156 is a single-filament bulb rated at 12V and 21W, housed in a BA15s bayonet base with symmetrically placed pins.
Because the 1156 and 1157 share a similar physical profile but differ in filament count and pin configuration, the two types are not interchangeable despite their visual resemblance.
The BA15s base of the 1156 and the BAY15d base of the 1157 have different pin alignments, so a socket designed for one will not correctly accept the other.
Both the 1156 and 1157 are ANSI-standardized bulbs recognized across the United States and Canada, meaning replacement units from various manufacturers conform to the same electrical and physical specifications.