Harley-Davidson FLHXXX Street Glide Trike Headlight Bulb Size
Harley-Davidson FLHXXX Street Glide Trike headlight bulb size specifications indicate 9003 bulb size for both high beam and low beam applications. The replacement chart covers 2010 through 2011 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.
The 9003 bulb is a dual-filament halogen type, meaning a single bulb contains two separate filaments to serve both high and low beam functions independently.
The 9003 operates at 12 volts, with a wattage rating of 60W on the high beam filament and 55W on the low beam filament.
The 9003 uses a P43t base, which is a bayonet-style mount with a 43mm flange width, a standard fitting in halogen headlight housings.
The 9003 designation follows ANSI standards as applied in the United States and Canada, making it a North American market specification.
The Harley-Davidson FLHXXX Street Glide Trike uses the 9003 bulb for both the high beam and low beam headlight positions across the 2010-2011 model years covered in these specifications.
Because the 9003 serves both beam functions in this application, the high beam and low beam headlight positions share an identical bulb part number, which simplifies parts stocking but requires attention to socket wiring to ensure correct filament activation.
The 9003 is functionally equivalent to the H4 bulb used in international markets, though the two designations reflect different regional standards bodies and the physical bases may present fitment differences depending on the housing design.