Mercury Cyclone Parking Brake Indicator Bulb Size

The Mercury Cyclone parking brake indicator utilizes bulb sizes 194 and 257 for the lighting components. Data for the specific lighting requirements covers the period from 1964 through 1971.

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

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

YearsUS TypeEU TypeShop
1968-1971194W5WCheck Price
1964-1967257257Check Price

Bulb Specifications

Description Type Shop
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.194Check Price
ECE standard (Europe & worldwide). Single-filament signalling bulb with W2.1x9.5d wedge base. 12V, 5W.W5WCheck Price
ANSI standard (US & Canada). Festoon or BA9s base instrument bulb. 12V, 2W.257Check Price

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