Mercury Colony Park brake bulbs utilize 1157, 3157, and 1034 sizes, while center high mount stop light bulbs use 922 and 912 sizes across multiple generations. The replacement chart covers vehicle production years from 1957 through 1991 with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercury Colony Park brake light specifications cover model years 1957 through 1991, with bulb sizes drawn from four distinct ANSI-standard types: 1034, 1157, 3157, and 922 or 912 for the center high mount stop light.
The 1157 is the most frequently specified brake bulb across Colony Park model years, appearing in 1963-1974 and 1987-1988 and 1991. It is a dual-filament bulb with a BAY15d bayonet base rated at 12V and 21W/5W, where the two wattage values correspond to its high and low filaments for stop and tail functions respectively.
The 1034 bulb was specified for the Mercury Colony Park from 1957-1962. Like the 1157, it uses a BAY15d bayonet base and carries a 12V, 21W/5W rating, and is classified as a variant of the 1157. The shared base type means both bulbs fit the same socket style, though they are not confirmed as interchangeable by these specifications.
The 3157 is a dual-filament wedge bulb in a T25 form factor, rated at 12V and 27W/7W. It was specified for the Colony Park in 1989-1990, making it the highest-wattage brake bulb across the listed model years.
The transition from the 3157 back to the 1157 between the 1990 and 1991 model years represents a change in both bulb construction and wattage output, as the two types use different physical bases and are not interchangeable despite both being dual-filament designs.
The center high mount stop light, a federally mandated third brake light introduced on passenger vehicles in the late 1980s, was specified only for the 1987-1991 Colony Park in these records.
The 922 wedge bulb in a T15 form factor at 12V and 16W was specified for the center high mount stop light in 1988-1991. The 912, a variant of the 921 bulb also in a T15 form factor but rated at a lower 12W, was specified for the 1987 model year.
The 922 and 912 are both single-filament wedge bulbs used solely for the center high mount stop light function, which operates only at full brightness with no secondary filament for a tail light role.
The BAY15d bayonet base shared by the 1034 and 1157 bulbs features two offset pins that prevent incorrect installation, a design characteristic common to dual-filament automotive bulbs where polarity and filament alignment are critical.
The wedge base construction of the 3157 and the T15 wedge bulbs differs fundamentally from the bayonet base of the 1157 and 1034, meaning socket compatibility is not shared between these two groups of brake bulb types.