Ski-Doo Formula 500 Brake Bulb Size

The Ski-Doo Formula 500 brake component requires a unique 1157 bulb size for proper installation and operation. Available data for the specified lighting equipment covers the 1997 to 1998 range.

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
1997-1998	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 an ANSI-standard dual-filament bulb rated at 12 volts, with a high filament draw of 21 watts and a low filament draw of 5 watts. This dual-filament design allows a single bulb to serve two distinct lighting functions within one housing.
The 1157 uses a BAY15d bayonet base, which features two offset pins at different heights. This asymmetric pin arrangement prevents incorrect insertion, ensuring the high and low filaments are connected to their correct circuits.
The Ski-Doo Formula 500 uses the 1157 bulb for the brake light position across the 1997-1998 model years.