The White WCL features front side marker bulbs in 1157 and 194 sizes, with rear side marker bulbs in 194 size. The replacement chart covers 1981 to 1988 model 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 White WCL uses two distinct bulb types across its front and rear side marker positions: the 194 and the 1157, both of which conform to ANSI standards recognized in the United States and Canada.
The 194 bulb is a miniature wedge type with a T10 form factor, rated at 12V and 3.78W, making it a low-wattage single-filament lamp suited to marker and clearance lighting applications.
The 1157 bulb uses a BAY15d bayonet base and carries a dual-filament design rated at 12V with separate filaments drawing 21W and 5W, a configuration that allows it to serve both a brighter active function and a dimmer standing-light function within a single housing.
The 194 bulb is the dominant fitment across the White WCL's side marker positions, appearing in both the front and rear marker locations for model years 1981-1987, as well as the rear marker position for the 1988 model year.
The front side marker position on the 1988 White WCL departs from the pattern seen in earlier years, requiring the 1157 rather than the 194.
Because the 1157 uses a BAY15d bayonet base and the 194 uses a wedge base, the two bulb types are physically non-interchangeable despite both operating on a 12V system.
The wattage difference between the 194 at 3.78W and the higher-draw filament of the 1157 at 21W is substantial, meaning the socket and wiring circuit for each position are matched to their respective bulb's electrical load.