The Jeep F-134 front and rear turn signal bulbs use either 1034 or 1154 size specifications. The replacement chart covers vehicle production spanning 1957 to 1966.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Jeep F-134 turn signal specifications cover the 1957, 1965, and 1966 model years, with both front and rear positions sharing identical bulb sizes in each respective year.
The 1034 bulb is an ANSI-standard dual-filament type rated at 12V and 21/5W, fitted with a BAY15d bayonet base, and is used in both the front and rear turn signals of the 1965-1966 F-134.
The BAY15d bayonet base features two offset pins, which physically prevent incorrect installation of a single-filament bulb in a dual-filament socket.
The 1034 is a variant of the widely used 1157 bulb, meaning the two share the same base type and general construction, though they differ in electrical output.
The 1154 bulb is an older ANSI-standard dual-filament type also using the BAY15d bayonet base, and it is specified for both the front and rear turn signals of the 1957 F-134.
Unlike the 1034, the 1154 is rated for both 6V and 12V operation, reflecting the transitional period in automotive electrical systems during the late 1950s when 6-volt systems were being phased out in favor of 12-volt systems.
The 1154 is described as an older variant of the 1157, placing it earlier in the same design lineage as the 1034, though the three bulbs are not directly interchangeable due to differences in voltage and wattage ratings.
Because the 1034 and 1154 share the same BAY15d base, physical fitment in the socket is possible across model years, but substituting one for the other without accounting for voltage compatibility risks incorrect operation or component damage.