Honda Motorcycle GL1800 Gold Wing Turn Signal Bulb Size
Honda Motorcycle GL1800 Gold Wing front turn signal bulbs measure 7443 in size, while rear turn signal bulbs measure 7440NA or 7443, with each bulb type specified for optimal replacement. The replacement chart covers 2001 through 2017 vehicle production years and contains bulb size specifications for turn signal applications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 7443 bulb is a dual-filament T20 wedge type rated at 12V with a 21W high filament and a 5W low filament, conforming to ANSI standards for the US and Canada markets.
The 7440NA bulb is a single-filament T20 wedge type rated at 12V, 21W, and features natural amber glass rather than a clear envelope, also conforming to ANSI standards for the US and Canada markets.
The Honda Motorcycle GL1800 Gold Wing uses the 7443 bulb for the front turn signal across all listed model years from 2001-2017, with no variation in that position throughout the entire span.
The rear turn signal of the GL1800 Gold Wing used the 7443 bulb from 2001-2005, then transitioned to the 7440NA from 2006-2017.
Although the 7443 and 7440NA share the same T20 wedge base and physical form factor, they are not functionally interchangeable due to the difference in filament count. The 7443 carries two filaments while the 7440NA carries one.
The natural amber glass of the 7440NA produces a color-filtered output directly from the bulb itself, whereas the 7443 relies on the lens housing to provide any amber coloring at the rear position.
Installing a 7443 in a rear socket specified for the 7440NA would introduce an additional active filament into a circuit designed for a single-filament load, which can affect turn signal flash rates governed by the motorcycle's flasher relay.