Honda Motorcycle GL1200A Gold Wing Aspencade headlight bulbs utilize 9003 size for both high beam and low beam applications. The replacement chart covers 1984 through 1987 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 Honda Motorcycle GL1200A Gold Wing Aspencade uses the 9003 bulb for both the high beam and low beam headlight positions across the 1984-1987 model years.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments, one rated at 60W for high beam output and one rated at 55W for low beam output.
The 9003 operates on a 12V electrical system, which is standard for motorcycle applications of this type.
The 9003 bulb follows the ANSI standard recognized in the United States and Canada, and it uses a P43t base, which is a bayonet-style fitting with a 43mm flange.
Because the same 9003 bulb serves both the high beam and low beam positions on the GL1200A Gold Wing Aspencade, the motorcycle relies on the bulb's internal dual-filament design rather than separate bulbs for each function.
The 9003 and H4 bulb types share the same P43t base and dual-filament configuration, though the 9003 designation is specific to the ANSI standard while H4 follows the ECE standard used in other markets. These types are often cross-compatible, but the applicable standard for this motorcycle is ANSI.