Harley-Davidson FLHTC Electra Glide Classic Turn Signal Bulb Size

Harley-Davidson FLHTC Electra Glide Classic rear turn signal bulbs use a P21W size, designated as 199 in certain specifications. The replacement chart covers 2007 through 2013 model years with corresponding bulb size data.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Rear Turn Signal

Years	Bulb Size
2013	P21W
2012	199
2011	P21W
2010	199
2007-2009	P21W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W.	P21W
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W.	199

Other Locations

Additional Notes

The P21W and 199 bulbs share identical electrical ratings of 12V and 21W, and both use a BA15s single-contact bayonet base, making them physically and electrically equivalent in those respects.
The P21W follows the ECE standard used in Europe and worldwide markets, while the 199 follows the ANSI standard used in the United States and Canada, reflecting a regional classification difference rather than a functional one.
The 199 is a variant of the 1156 bulb type, a widely used single-filament automotive signalling bulb in the North American market.
Both bulb types are single-filament designs, meaning each serves a dedicated signalling function without a secondary filament for combined stop or running light duties.
The Harley-Davidson FLHTC Electra Glide Classic rear turn signal specification alternates between the P21W and 199 across model years, with 2007, 2008, 2009, 2011, and 2013 using the P21W, and 2010 and 2012 using the 199.
Because the P21W and 199 share the same BA15s base and 12V/21W rating, cross-compatibility between the two types is technically supported by their shared physical and electrical characteristics.