Harley-Davidson FXE Super Glide Brake Bulb Size

Harley-Davidson FXE Super Glide uses a 1157 bulb size for brake applications. The replacement chart covers 1974 to 1984 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 Size
1974-1984	1157

Bulb Specifications

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

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Additional Notes

The Harley-Davidson FXE Super Glide uses the 1157 bulb for the brake light across all listed model years, spanning 1974-1984.
The 1157 is an ANSI-standardized bulb type recognized across the United States and Canada, meaning it conforms to a defined set of electrical and physical standards shared across many vehicle applications.
The 1157 is a dual-filament bulb, which allows it to serve two distinct brightness levels within a single housing, typically supporting both a running light function and a brighter brake light function.
The bulb operates on a 12-volt electrical system and carries a wattage rating of 21W for the high-intensity filament and 5W for the low-intensity filament.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design where the two pins are positioned at different heights to prevent incorrect installation orientation.
The offset pin configuration of the BAY15d base means a single-filament bulb sharing a similar base style, such as the 1156, is not a compatible substitute, as the pin spacing and filament count differ.