The White WIM features front side marker bulbs in 1157 and 194 sizes, with rear side marker bulbs in 194 size. The replacement chart covers vehicle production spanning 1984 to 1988.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 194 bulb is the most widely used type across these specifications, appearing in both the front and rear side marker positions for the White WIM across 1984-1987, as well as the rear side marker position in 1988.
The 194 is a miniature wedge bulb of the T10 type, rated at 12V and 3.78W, and follows the ANSI standard applicable in both the United States and Canada.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a wattage split of 21W and 5W, also conforming to ANSI standards for the US and Canadian markets.
The dual-filament design of the 1157 means it supports two independent brightness levels within a single bulb, a characteristic that distinguishes it from the single-filament 194.
The White WIM (1988) uses the 1157 exclusively in the front side marker position, making it the only year and position in these specifications where that bulb type is required.
Because the 1157 uses a BAY15d bayonet base and the 194 uses a wedge base, the two bulb types are not interchangeable despite sharing the same 12V operating voltage.
The rear side marker position across all listed years, 1984-1988, consistently calls for the 194 bulb, indicating a stable fitment requirement for that position throughout the entire model range covered.
The front side marker position for the White WIM shifted from the 194 bulb used in 1984-1987 to the 1157 in 1988, representing a change in both bulb type and base configuration between those model years.