Honda Motorcycle VT600C Shadow VLX Turn Signal Bulb Size
Honda Motorcycle VT600C Shadow VLX front turn signal bulbs measure P21/5W or 1034 in size, while rear turn signal bulbs measure P21W or 1073 in size. The replacement chart covers vehicle production years spanning 1988 to 2007 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 VT600C Shadow VLX front turn signal position uses two distinct bulb types across its production run: the 1034 (ANSI standard) for model years 1988-1997, and the P21/5W (ECE standard) for model years 1998-2007.
The P21/5W is a dual-filament bulb operating at 12V with a 21W main filament and a 5W secondary filament, fitted with a BAY15d bayonet base. Its ECE designation reflects its origin as a European and worldwide standard.
The 1034 is its ANSI-standard counterpart, sharing the same BAY15d bayonet base and a comparable 12V, 21/5W dual-filament configuration. It is classified as a variant of the more widely known 1157 bulb.
Although the P21/5W and 1034 share the same BAY15d base type, they originate from different standardization systems (ECE and ANSI respectively), and direct interchangeability between them warrants attention to regional specification differences.
The rear turn signal position on the Honda Motorcycle VT600C Shadow VLX uses single-filament bulbs throughout its production run, in contrast to the dual-filament bulbs used at the front.
The P21W is a single-filament ECE-standard bulb rated at 12V and 21W, fitted with a BA15s bayonet base. It is the predominant rear turn signal bulb across the model's production years.
The 1073 is a single-filament ANSI-standard bulb with a BA15s bayonet base, rated at 12V and 13W. It is described as a lower wattage variant of the 1156 and appears in the rear turn signal position for model years 1989, 1991, and 1995.
The BA15s base shared by the P21W and 1073 is physically similar, but the wattage difference (21W versus 13W) means the two bulbs are not equivalent in output, which is a relevant fitment consideration for the rear position.
The front and rear turn signal positions on this model use different base types: BAY15d for the front (dual-filament) and BA15s for the rear (single-filament). These two base types are not interchangeable.
Across the full production span of the Honda Motorcycle VT600C Shadow VLX, the rear turn signal position shows non-uniform bulb fitment, with the 1073 appearing in isolated model years rather than as a continuous block, while the front position follows a clean split between two bulb types at the 1997-1998 boundary.