White WIS Headlight Bulb Size

The White WIS 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 1984 to 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.

High Beam Headlight

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1988	9004 (With Composite Headlamps)	HB1	Check Price
1988	H6024 (With Sealed Beam Headlamps)	H6024	Check Price
1984-1987	9004 (Conventional)	HB1	Check Price
1984-1987	H4651 (Except Conventional)	H4651	Check Price

Low Beam Headlight

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1988	9004 (With Composite Headlamps)	HB1	Check Price
1988	H6024 (With Sealed Beam Headlamps)	H6024	Check Price
1984-1987	9004 (Conventional)	HB1	Check Price
1984-1987	H4656 (Except Conventional)	H4656	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament halogen bulb with P29t base. 12V, 65W/45W.	9004	Check Price
ANSI standard (US & Canada). 7-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6024	Check Price
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H4651	Check Price
ANSI standard (US & Canada). 4x6-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H4656	Check Price

Other Locations

Additional Notes

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.
The White WIS uses the 9004 bulb across both high and low beam positions in composite headlamp configurations, meaning one bulb size covers both functions in that headlamp system.
The H6024 is a 7-inch round sealed beam unit conforming to ANSI standards for the US and Canada. The entire unit is replaced rather than an internal bulb, as the light source is integral to the sealed assembly.
The H4651 and H4656 are both 4x6-inch rectangular sealed beam units operating at 12V under the same ANSI standard framework. Despite sharing the same physical form factor, they carry different part designations corresponding to their respective high beam and low beam roles.
Because H4651, H4656, and H6024 are sealed beam units, they are not interchangeable with the 9004 halogen bulb. The two headlamp systems, sealed beam and composite, represent fundamentally different hardware configurations requiring separate replacement parts.
For 1984-1987 White WIS applications, the conventional configuration uses the 9004 bulb, while non-conventional configurations use sealed beam units, specifically H4651 for high beam and H4656 for low beam.
The 1988 model year introduced a terminology shift in the specifications, with headlamp types described as "With Composite Headlamps" and "With Sealed Beam Headlamps" rather than "Conventional" and "Except Conventional" as used in prior years.
In the 1988 sealed beam configuration, both high and low beam positions share the H6024 designation, which differs from the 1984-1987 arrangement where high and low beam sealed units carried distinct part numbers.