Harley-Davidson FXD Dyna Super Glide Turn Signal Bulb Size

Harley-Davidson FXD Dyna Super Glide front turn signal bulbs use 198 size, while rear turn signal bulbs use 199 and P21W sizes. The replacement chart covers 1995 to 1998 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.

Front Turn Signal

Years	Bulb Type	Shop
1995-1998	198	Check Price

Rear Turn Signal

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1998	199	199	Check Price
1997	1156	P21W	Check Price
1996	199	199	Check Price
1995	1156	P21W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 2W.	198	Check Price
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W.	199	Check Price
ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W.	P21W	Check Price
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156	Check Price

Other Locations

Additional Notes

The front turn signal position on the Harley-Davidson FXD Dyna Super Glide uses the 198 bulb across the 1995-1998 model years. This bulb follows the ANSI standard applicable in the US and Canada, operates at 12V with a 2W output, and uses a T5 miniature wedge base.
The 198 bulb's 2W output places it in the low-wattage range, consistent with indicator and marker light applications rather than high-intensity signalling functions.
The rear turn signal position alternates between two bulb types depending on the model year. The 1995 and 1997 model years use the P21W, while the 1996 and 1998 model years use the 199.
Both the 199 and P21W are single-filament bulbs rated at 12V and 21W, and both use a BA15s bayonet base. Despite these shared electrical and physical characteristics, they are governed by different standards bodies: the 199 follows the ANSI standard used in the US and Canada, while the P21W follows the ECE standard used in Europe and internationally.
The 199 is noted as a variant of the 1156 bulb. The 1156 is a widely used automotive signalling bulb, and the 199 shares its BA15s bayonet base and single-filament configuration.
Because the 199 and P21W share the same BA15s base and identical voltage and wattage ratings, physical fitment between the two is possible. However, substituting one for the other may affect compliance with regional lighting regulations, as each bulb is certified under a different standard.