The White WX headlight bulb size chart specifies high beam and low beam bulb options including 9004, H6024, H4651, and H4656 sizes for this model. The replacement chart covers 1981 through 1988 vehicle 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 9004 bulb is a dual-filament halogen type operating at 12V with a P29t base, rated at 65W on the high beam filament and 45W on the low beam filament. Its dual-filament design allows a single bulb to serve both high and low beam functions within a composite headlamp assembly.
For the White WX with composite headlamps in 1988, the 9004 bulb covers both the high beam and low beam positions, making it the sole bulb type required for that headlamp configuration.
The H6024 is a 7-inch round sealed beam unit rated at 12V. It is not a replaceable bulb in the conventional sense; the entire sealed unit is replaced when the light source fails. It appears only in the 1988 model year under the sealed beam headlamp configuration.
The H4651 and H4656 are both 4x6-inch rectangular sealed beam units rated at 12V, and neither accepts a replaceable bulb. The H4651 is specified for high beam positions and the H4656 for low beam positions across the 1981-1987 model years under non-conventional headlamp configurations.
Because the H4651 and H4656 share the same physical 4x6-inch rectangular sealed beam format, they are not interchangeable. Each unit contains a fixed internal filament arrangement optimized for its designated beam function, and substituting one for the other would result in incorrect beam output.
The 9004 bulb is listed for conventional headlamp configurations across all model years from 1981-1988, making it the most consistently specified bulb type in these specifications.
The headlamp system of the White WX shifted in 1988 to include a composite headlamp option alongside the sealed beam option, introducing the 9004 bulb into a configuration where it had not previously appeared alongside sealed beam alternatives.
The sealed beam units H6024, H4651, and H4656 all conform to ANSI standards applicable in the United States and Canada, meaning their physical and photometric characteristics are governed by standardized specifications rather than manufacturer-specific designs.