Honda Motorcycle GL500 Silver Wing Turn Signal Bulb Size
Honda Motorcycle GL500 Silver Wing front turn signal bulbs use 1034 size while rear turn signal bulbs use P21W or 1073 size. The replacement chart covers 1981 to 1982 model 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 GL500 Silver Wing uses three distinct bulb types across its turn signal positions and model years: the 1034, the P21W, and the 1073.
The 1034 is the most consistently used bulb in these specifications, appearing in both the 1981-1982 front turn signal positions.
The 1034 is an ANSI-standard dual-filament bulb rated at 12V and 21/5W, fitted with a BAY15d bayonet base, and is classified as a variant of the 1157.
Because the 1034 carries a dual-filament design with a BAY15d base, it is not directly interchangeable with single-filament bulbs that use the physically different BA15s base.
The rear turn signal position changed bulb types between model years, with the 1981 GL500 Silver Wing using the 1073 and the 1982 model using the P21W.
Although the 1073 and P21W share the same BA15s bayonet base, their wattage ratings differ: the 1073 is rated at 13W while the P21W is rated at 21W, which affects their interchangeability.
The P21W follows the ECE standard used in Europe and worldwide markets, whereas the 1034 and 1073 follow the ANSI standard applied in the US and Canada.
The 1073 is described as a lower wattage variant of the 1156, operating at 12V and 13W with a single-filament configuration.