The Jeep CJ5A front and rear turn signal bulbs both utilize a 1034 size bulb for proper operation. The replacement chart covers vehicle production spanning 1966 to 1968.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1034 bulb is an ANSI-standardized type used in both the United States and Canada, operating at 12 volts with a dual-filament design rated at 21/5 watts.
The dual-filament construction of the 1034 allows it to serve two lighting functions within a single housing, with the higher-wattage filament handling the turn signal function and the lower-wattage filament handling a secondary function such as running or brake light duty.
The 1034 uses a BAY15d bayonet base, which is an offset-pin base type. The two pins are positioned at different heights, which prevents incorrect insertion of the bulb into the socket.
The 1034 is a variant of the 1157 bulb. While the two types share the BAY15d base and general dual-filament configuration, they are not confirmed as interchangeable in these specifications, and substitution without verification of wattage and voltage compatibility could affect circuit performance.
The Jeep CJ5A used the 1034 bulb size for the front turn signal across the 1966-1968 model years.
The rear turn signal of the Jeep CJ5A also used the 1034 bulb size across the same 1966-1968 model years, making the front and rear turn signal positions share an identical bulb specification throughout that period.