Harley-Davidson FXDS-Conv Dyna Convertible Tail Light Bulb Size

Harley-Davidson FXDS-Conv Dyna Convertible tail light bulb uses a 198 size. The replacement chart covers 1994 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.

Bulb Size by Year Range

Years	Bulb Type	Shop
1994-1998	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 FXDS-Conv Dyna Convertible uses the 198 bulb for the tail light position across the 1994-1998 model years.
The 198 bulb is classified under the ANSI standard, which is the recognized specification framework used in the United States and Canada for automotive and miniature lighting applications.
It belongs to the T5 form factor, a miniature wedge-base bulb type. The wedge base design means the bulb is held in place by the socket gripping the glass envelope directly, with no separate metal base or pins.
The 198 bulb operates at 12 volts and draws 2 watts, placing it at the low end of the power range for automotive signal and marker lighting.
The T5 designation refers to the bulb envelope width, expressed in eighths of an inch, making the glass envelope five-eighths of an inch wide.
The wedge-base construction of the 198 bulb means fitment is socket-dependent. Substituting a bulb with a different base type, even at the same voltage and wattage, would not be physically compatible with the original socket.