The White WIS front and rear turn signal bulbs utilize 1157 and 2057 sizes. The replacement chart covers 1984 to 1988 production years 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 2057 bulb is the most frequently specified type across the White WIS turn signal data, appearing in both front and rear positions for the 1984-1987 model years.
The 2057 is a dual-filament bulb operating at 12V with a high-intensity filament rated at 26.9W and a low-intensity filament rated at 8W, conforming to ANSI standards recognized in both the United States and Canada.
The 1157 is a dual-filament bulb operating at 12V with filaments rated at 21W and 5W, also conforming to ANSI standards recognized in both the United States and Canada.
Both the 1157 and 2057 use a BAY15d bayonet base, which is a double-contact offset-pin base designed to prevent incorrect insertion by positioning its two pins at different heights.
The shared BAY15d base between the 1157 and 2057 means the two types are physically interchangeable in terms of socket fit, though their wattage ratings differ.
The 2057 draws more power than the 1157 on both filaments, with the high-intensity filament producing approximately 5.9W more and the low-intensity filament producing 3W more.
For the White WIS 1988 model year, both the front and rear turn signal positions specify the 1157, representing a shift from the 2057 used in prior years.
The front and rear turn signal positions share identical bulb specifications for every model year in the data, meaning no asymmetric fitment exists between the two positions on the White WIS.