White WXLL front side marker bulbs utilize 1157 or 194 bulb sizes, while rear side marker bulbs require the 194 size. The replacement chart covers 1986 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 1988 White WXLL uses a 1157 bulb for the front side marker position, which differs from the 194 bulb used in the same position for 1986-1987 models.
The 1157 is a dual-filament bulb operating at 12V with a 21W/5W power rating and a BAY15d bayonet base, conforming to ANSI standards in the US and Canada.
The 194 is a single-filament miniature wedge bulb of the T10 type, rated at 12V and 3.78W, also conforming to ANSI standards in the US and Canada.
Because the 1157 uses a BAY15d bayonet base and the 194 uses a wedge base, the two bulb types are not interchangeable despite both being 12V components.
The rear side marker position uses a 194 bulb across all three model years covered in the specifications.
The 1986-1987 front and rear side marker entries carry an "Except Conventional" qualifier, indicating that the 194 fitment applies only to non-conventional body configurations in those years.
The 1988 rear side marker retains the 194 bulb without any body-style qualifier, whereas the front side marker for that year shifts to the higher-wattage 1157.
The dual-filament design of the 1157 means it carries two separate circuits within one bulb envelope, a characteristic absent in the single-filament 194 used elsewhere in these specifications.