The White WCL front and rear turn signal bulbs utilize either 1157 or 2057 size specifications. The replacement chart covers 1981 through 1988 production years with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The White WCL uses two bulb types across its front and rear turn signal positions: the 1157 and the 2057, both of which are ANSI-standardized for the US and Canadian markets.
The 2057 is the dominant bulb type across the White WCL's turn signal specifications, appearing in both the front and rear positions for model years 1981-1987.
For the 1988 model year, both the front and rear turn signals transitioned to the 1157 bulb.
Both the 1157 and 2057 are dual-filament bulbs, meaning each serves two lighting functions within a single housing, typically combining a brighter turn signal filament with a lower-intensity running or parking light filament.
Both bulb types share the BAY15d bayonet base, a two-pin offset base design that physically locks the bulb into the socket and prevents incorrect insertion.
The 2057 operates at 26.9W on its high filament and 8W on its low filament, while the 1157 operates at 21W and 5W respectively, making the 2057 the higher-output variant of the two.
Despite the difference in wattage, the shared BAY15d base means the 1157 and 2057 are physically interchangeable in the White WCL's sockets, though their electrical output differs.
Both bulb types operate on a 12V electrical system, consistent with standard automotive voltage.