The Jeep J-3500 front and rear turn signal bulbs utilize 199, 1156, or 1034 size specifications. The replacement chart covers 1965 to 1970 production 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 1034 bulb is the most frequently specified type across the Jeep J-3500 turn signal positions, covering both front and rear applications for the 1965-1968 model years.
The 1034 is a dual-filament bulb rated at 12V with a 21/5W output, meaning it operates two separate filaments at different wattages within a single housing, a design that typically serves both signaling and running light functions simultaneously.
The 1034 uses a BAY15d bayonet base, which features two offset pins to ensure correct orientation during installation and prevent the filaments from being connected to the wrong circuit.
The 1034 is classified as a variant of the 1157 under the ANSI standard, indicating a close relationship in base type and general construction, though the two are not necessarily interchangeable without confirming socket and circuit compatibility.
For the 1969 model year, the Jeep J-3500 transitions to the 1156 bulb for both front and rear turn signals, a single-filament type rated at 12V and 21W with a BA15s bayonet base.
The 1970 model year specifies the 199 bulb for both front and rear turn signals, which shares the same BA15s bayonet base, 12V rating, and 21W output as the 1156, as the 199 is itself a variant of the 1156 under the ANSI standard.
Because the 199 and 1156 share the same base type and electrical ratings, the physical and electrical interface between the two is effectively identical, though they carry distinct ANSI designations.
The shift from the dual-filament 1034 to the single-filament 1156 and 199 in later model years reflects a change in the number of circuits the turn signal bulb was designed to serve, since single-filament types handle only one function per socket.
All three bulb types specified for the Jeep J-3500 conform to ANSI standards recognized in both the United States and Canada, placing them within a standardized classification system for automotive lighting components.
Front and rear turn signal positions share identical bulb specifications for every model year listed, meaning no distinction in bulb type exists between the two positions within any given year.