Harley-Davidson FXDWG Dyna Wide Glide Brake Bulb Size

Harley-Davidson FXDWG Dyna Wide Glide uses a 198 bulb size for brake applications. The replacement chart covers vehicle production spanning 1993 to 1998.

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

Bulb Size by Year Range

Years	Bulb Type	Shop
1993-1998	198	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 2W.	198	Check Price

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Additional Notes

The Harley-Davidson FXDWG Dyna Wide Glide uses the 198 bulb for its brake light across the 1993-1998 model years.
The 198 is classified as a miniature wedge bulb with a T5 form factor, meaning it uses a wedge-style base rather than a bayonet or screw mount, and the bulb body is approximately 5/8 of an inch wide at its widest point.
The 198 bulb operates at 12 volts and draws 2 watts, placing it in the low-wattage range typical of indicator and signal applications rather than high-output lighting.
The 198 bulb conforms to ANSI standards recognized in both the United States and Canada, meaning it meets a standardized specification for electrical and photometric performance in those markets.
The wedge base design of the 198 bulb requires no separate metal base or socket pins; the glass envelope itself acts as the retention mechanism when inserted into a compatible socket.
Because the 198 is a miniature wedge type, substitution with physically similar wedge bulbs of differing wattage ratings risks exceeding the socket's thermal tolerance or altering brake light intensity in ways that may affect compliance with lighting regulations.