Honda Motorcycle GL1500A Gold Wing Aspencade tail light bulbs utilize 24 size for inner applications and 2057 size for outer positions. The replacement chart covers 1991 to 2000 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 GL1500A Gold Wing Aspencade uses two distinct tail light bulb types across its inner and outer positions for the 1991-2000 model years.
The inner tail light position across all 1991-2000 model years takes a size 24 bulb, an ANSI-standard single-filament type rated at 12V and 2W with a BA9s base.
The BA9s base is a small-pin bayonet cap, which is physically incompatible with the BAY15d bayonet base used in the outer tail light position, making the two bulb types non-interchangeable despite both being 12V.
The outer tail light position across all 1991-2000 model years takes a size 2057 bulb, a dual-filament ANSI-standard type rated at 12V with a BAY15d bayonet base and a wattage split of 26.9W on the high filament and 8W on the low filament.
The dual-filament design of the 2057 bulb allows it to serve two brightness levels within a single housing, which is typical of combined tail and brake light functions in automotive and motorcycle applications.
The 2057 is a brighter variant of the 1157 bulb. While the 1157 and 2057 share the same BAY15d base and are physically compatible, the difference in wattage output means they are not electrically identical, and substituting one for the other affects light output.
Both the size 24 and size 2057 bulbs conform to ANSI standards applicable in the United States and Canada, indicating standardized performance and dimensional specifications within those markets.
The size 24 bulb operates at only 2W, placing it among the lowest-wattage bulbs in common automotive use, consistent with its role as an indicator or low-intensity inner tail light rather than a primary brake or running light.