Cadillac Series 62 front and rear turn signal bulbs utilize 1157, 1034, or 1154 bulb sizes depending on production specifications. The replacement chart covers 1950 through 1964 model years with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Cadillac Series 62 turn signal specifications cover model years 1950 through 1964, spanning both front and rear positions across three distinct bulb types: 1034, 1154, and 1157.
The 1034 bulb is the most frequently specified type across the Series 62 lineup, appearing in both front and rear turn signal positions for the 1953-1963 model years.
All three bulb types in these specifications share the BAY15d bayonet base, a dual-pin offset base design that physically locks the bulb into the socket through a twist-and-lock motion.
All three bulb types carry dual-filament configurations, meaning a single bulb serves two brightness levels, typically one filament for steady running light use and a higher-wattage filament for the turn signal flash.
The 1154 bulb, specified for the Cadillac Series 62 in 1950-1952, is rated for both 6V and 12V operation, reflecting the automotive industry's transition from 6-volt to 12-volt electrical systems during that era.
The 1034 and 1157 bulbs are both rated at 12V with a 21W/5W dual-filament output, while the older 1154 carries a dual-voltage rating rather than a fixed wattage, indicating a different design generation.
The 1034 is classified as a variant of the 1157, and both share the same BAY15d base and 12V/21W/5W ratings, though they are not confirmed as interchangeable within these specifications.
The 1964 Cadillac Series 62 is the only model year in these specifications where both the front and rear turn signals use the 1157 bulb, marking a departure from the 1034 used in the preceding decade.
All three bulb types conform to ANSI standards applicable in both the United States and Canada, placing them within a standardized North American automotive lighting classification system.
The front and rear turn signal bulb sizes are identical for every model year covered in these specifications, indicating no positional differentiation in bulb selection across the Series 62 range.