Harley-Davidson FXST Softail Standard Headlight Bulb Size
Harley-Davidson FXST Softail Standard headlight bulbs utilize 9003 and H5006 sizes for both high and low beam functions. The replacement chart covers 1987 through 2007 production 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 Harley-Davidson FXST Softail Standard uses two distinct headlight bulb types across its production span: the 9003 halogen bulb for model years 1999-2007 and the H5006 sealed beam unit for model years 1987-1990.
The 9003 is a dual-filament halogen bulb rated at 12V with a 60W high beam filament and a 55W low beam filament, fitted with a P43t base. Its dual-filament design allows a single bulb to serve both the high beam and low beam functions.
Because the 9003 handles both beam functions within one unit, the high beam and low beam headlight positions on the 1999-2007 FXST Softail Standard take the same bulb size.
The H5006 is a 5.75-inch round sealed beam unit operating at 12V. In a sealed beam design, the reflector, lens, and filament are fused into a single glass unit, meaning the entire assembly is replaced rather than an individual bulb.
The same sealed beam replacement pattern applies to both the high beam and low beam positions on the 1987-1990 FXST Softail Standard, with the H5006 specified for each.
Both the 9003 and H5006 carry ANSI standard designations recognized in the United States and Canada, indicating conformance to a defined set of electrical and photometric performance criteria within those markets.
The 9003 and H5006 are not interchangeable. The sealed beam H5006 is a self-contained glass unit, while the 9003 is a replaceable capsule-style halogen bulb seated in a separate reflector housing, representing a fundamentally different headlight construction.