The Jeep J-2800 uses 1034 bulb size for both front and rear turn signal applications. The replacement chart covers 1965 to 1968 vehicle 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 1034 bulb is the sole bulb type specified for the Jeep J-2800 across all listed turn signal positions and model years.
The 1034 is an ANSI-standard bulb recognized in both the United States and Canada, operating at 12 volts with a dual-filament output rated at 21/5 watts.
A dual-filament design allows a single bulb to serve two distinct brightness levels, which in turn signal applications typically corresponds to the turn signal flash function and a lower-intensity running or parking light function.
The 1034 uses a BAY15d bayonet base, a two-pin offset bayonet mount where the two pins are positioned at different heights to ensure the bulb is seated in only one orientation, preventing incorrect filament alignment.
The 1034 is described as a variant of the 1157, a widely used automotive bulb that shares the BAY15d base and dual-filament configuration but carries different wattage or voltage ratings depending on the specific variant.
The front and rear turn signal positions on the Jeep J-2800 share the same 1034 bulb specification across the 1965-1968 model years, indicating a uniform fitment requirement for both locations.
Because the 1034 is a variant of the 1157 rather than an identical replacement, direct substitution with an 1157 warrants verification of voltage and wattage compatibility before use.