Harley-Davidson FXDC Super Glide Custom Headlight Bulb Size
Harley-Davidson FXDC Super Glide Custom headlight bulbs use 9003 size for both high and low beam functions. The replacement chart covers 2005 through 2014 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 FXDC Super Glide Custom uses the 9003 bulb size for both the high beam and low beam headlight positions across the 2005-2014 model years.
The 9003 is an ANSI-standardized bulb designation used in the United States and Canada, distinguishing it from the functionally similar H4 designation used in international markets.
As a dual-filament halogen bulb, the 9003 houses both the high beam and low beam light sources within a single unit, which accounts for its use in both headlight positions on this model.
The 9003 operates on a 12-volt electrical system and draws 60 watts on the high beam filament and 55 watts on the low beam filament.
The 9003 uses a P43t base, a three-pronged bayonet-style mount that physically locks the bulb into the headlight housing and aligns the filaments with the reflector optics.
Because a single 9003 bulb serves both beam functions, replacing the headlight bulb on the FXDC Super Glide Custom addresses both high and low beam output simultaneously.