White WXLL front and rear turn signal bulbs utilize 1157 and 2057 bulb sizes for replacement applications. The replacement chart covers vehicle production spanning 1986 to 1988 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 1157 and 2057 are the two bulb types specified for the White WXLL across the 1986-1988 model years, covering both front and rear turn signal positions.
Both the 1157 and 2057 are ANSI-standardized bulb types recognized in the United States and Canada.
Both bulb types use a BAY15d bayonet base, a dual-contact base design where the two pins are offset at different heights to ensure correct orientation during installation.
Both the 1157 and 2057 are dual-filament bulbs, meaning each contains a high-intensity filament and a low-intensity filament within a single housing, serving separate functions such as turn signaling and running light operation.
The 1157 operates at 12V with filament ratings of 21W and 5W, while the 2057 operates at 12V with filament ratings of 26.9W and 8W, making the 2057 the higher-output variant of the two.
The 1988 White WXLL uses the 1157 bulb in both the front and rear turn signal positions.
The 1986-1987 White WXLL uses the 2057 bulb in both the front and rear turn signal positions, with the qualification that this applies except to the Conventional configuration.
Although the 1157 and 2057 share the same BAY15d base, they are not interchangeable without consideration of wattage differences, as the 2057 draws more power on both filaments than the 1157.