The Volvo WC headlight bulb uses a 9004 or H6024 size for both high beam and low beam applications. Replacement chart data covers 1996 to 1998 model 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 9004 is a dual-filament halogen bulb operating at 12V with a power draw of 65W on the high beam filament and 45W on the low beam filament, fitted with a P29t base. Because both filaments are housed in a single bulb, the 9004 serves both high and low beam functions within one unit.
The H6024 is a 7-inch round sealed beam unit conforming to ANSI standards for the US and Canadian markets. Unlike a conventional replaceable bulb, the entire sealed beam assembly is replaced as one piece when the light source fails.
Both the 9004 and H6024 are ANSI-standardized types for the US and Canadian markets, meaning their physical and electrical specifications are governed by a common industry standard rather than being proprietary to a single manufacturer.
The Volvo WC for 1996-1997 was available with either halogen capsule headlamps or sealed beam headlamps, and the correct bulb type depends entirely on which headlamp system the vehicle carries. The two types are not interchangeable.
For 1996-1997 vehicles equipped with halogen capsule headlamps, the 9004 bulb applies to both the high beam and low beam positions. For those equipped with sealed beam headlamps, the H6024 unit covers both functions.
The 1998 model year lists only the 9004 for both high beam and low beam, with no sealed beam variant noted for that year.
Because the 9004 handles both beam functions through its dual filaments, it occupies a single socket position rather than requiring separate bulbs for high and low beam outputs.