The Jeep CJ3 uses 1034 bulb size for both front and rear turn signal applications. This replacement chart covers vehicle production spanning 1959 to 1966.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Jeep CJ3 uses the 1034 bulb for both its front and rear turn signals across the 1959-1966 model years.
The 1034 is an ANSI-standardized bulb type, meaning it conforms to a defined set of electrical and physical characteristics recognized across the United States and Canada.
The 1034 is a dual-filament bulb, which means it contains two separate filaments within a single envelope, allowing it to serve more than one lighting function from a single socket.
The 1034 operates on a 12-volt electrical system and carries a wattage rating of 21/5W, where the higher wattage corresponds to the brighter turn signal filament and the lower wattage to the secondary filament.
The 1034 uses a BAY15d bayonet base, a two-pin offset base design that physically prevents incorrect insertion by positioning the two pins at different heights along the base.
The 1034 is a variant of the more widely known 1157 bulb. While the two share the same BAY15d base and dual-filament design, they are not identical, and substitution between them warrants attention to wattage and voltage compatibility before use.