The Honda Motorcycle GL1200I Gold Wing Interstate uses 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 1984 to 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 9003 bulb is a dual-filament halogen type, meaning a single bulb contains two separate filaments: one rated at 60W for high beam operation and one rated at 55W for low beam operation.
The 9003 designation follows the ANSI standard recognized in the United States and Canada, and the bulb uses a P43t base, which is a specific bayonet-style fitting with a 43mm flange.
The Honda Motorcycle GL1200I Gold Wing Interstate uses the 9003 bulb for both the high beam and low beam headlight positions across all covered model years from 1984-1987.
Because both headlight positions share the same 9003 bulb specification, a single bulb type serves the entire headlight assembly rather than requiring separate bulbs for each function.
The 9003 bulb operates on a 12V electrical system, which is consistent with the standard voltage found in motorcycle electrical systems of this type.
The P43t base is not universally interchangeable with other common halogen base types, so substituting a bulb with a different base configuration would not be compatible with this fitment.