The Isuzu Trooper high beam and low beam headlight bulbs utilize a 9004 or H6024 size. The replacement chart covers vehicle production spanning 1984 to 2002.
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, meaning a single unit contains both the high beam and low beam filaments. It operates at 12 volts with a power draw of 65 watts on high beam and 45 watts on low beam, and it uses a P29t base for mounting.
The Isuzu Trooper uses the 9004 bulb for both high beam and low beam functions across the 1987-2002 model years, reflecting the dual-filament nature of the 9004 type, which serves both lighting roles within one housing.
The H6024 is a 7-inch round sealed beam unit rather than a replaceable bulb. When this unit fails, the entire assembly is replaced rather than an individual filament or capsule.
The 1984-1986 Isuzu Trooper uses the H6024 sealed beam unit for both high and low beam functions, which represents a fundamentally different headlight construction compared to the halogen capsule system used in later model years.
Both the 9004 and H6024 conform to ANSI standards applicable in the United States and Canada, indicating they meet the photometric and dimensional requirements defined by that standardization body for those markets.
The 9004 and H6024 are not interchangeable. The sealed beam H6024 integrates the lens, reflector, and filament into one fixed unit, while the 9004 is a replaceable halogen capsule installed within a separate housing assembly.