The Jeep J-3600 front and rear turn signal bulbs use 199 and 1034 bulb sizes. The replacement chart covers 1965 to 1970 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Jeep J-3600 uses two distinct bulb types across its turn signal positions: the 199 for 1969-1970 models and the 1034 for 1965-1968 models, applying equally to both front and rear turn signal positions in each respective period.
The 1034 bulb is a dual-filament type rated at 12V with a 21/5W output, meaning it operates at two brightness levels, typically serving both a turn signal function and a secondary running or brake light function through its BAY15d bayonet base.
The 199 bulb is a single-filament type rated at 12V and 21W, designed for a dedicated single-function role, and uses a BA15s bayonet base, which is not interchangeable with the BAY15d base found on the 1034.
The BA15s base of the 199 features a single locating pin on its collar, while the BAY15d base of the 1034 features two offset pins. This physical difference prevents cross-installation between the two bulb types.
Both the 199 and 1034 are ANSI-standardized bulbs recognized in both the United States and Canada, placing them within a widely used North American automotive lighting classification system.
The 199 is described as a variant of the 1156, a common single-filament bayonet bulb, while the 1034 is described as a variant of the 1157, a common dual-filament bayonet bulb. These variant designations indicate close but not necessarily identical electrical or physical specifications relative to their base types.
For the Jeep J-3600, the front and rear turn signal positions share the same bulb size within any given model year, so a single bulb type applies to all four turn signal sockets on vehicles from 1965-1968 and similarly on 1969-1970 vehicles.