Harley-Davidson FXRS Low Glide Brake Bulb Size

Harley-Davidson FXRS Low Glide utilizes a 1157 bulb size for brake applications. The replacement chart covers 1982 to 1984 model 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 Size
1982-1984	1157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157

Other Locations

Additional Notes

The 1157 is a dual-filament bulb operating on a 12-volt system, with filaments rated at 21 watts and 5 watts respectively. The higher-wattage filament serves the brake function, while the lower-wattage filament handles the running light function within the same housing.
The 1157 uses a BAY15d bayonet base, which features two offset pins positioned at different heights on the base. This offset pin design prevents incorrect insertion, as a single-filament bulb with a BA15s base cannot be seated in a BAY15d socket.
The 1157 is classified under the ANSI standardization system, making it a recognized specification across the United States and Canada. This standardization means the bulb is produced by multiple manufacturers to the same electrical and physical tolerances.
The Harley-Davidson FXRS Low Glide used the 1157 bulb for brake lighting across the 1982-1984 model years.