Jeep CJ6A Turn Signal Bulb Size

The Jeep CJ6A uses 1034 bulb size for both front and rear turn signal applications. Replacement chart data covers 1966 to 1968 production years.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Front Turn Signal

Years	Bulb Size
1966-1968	1034

Years	Bulb Size
1966-1968	1034

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.	1034

The 1034 bulb is the sole turn signal bulb type listed for the Jeep CJ6A across all documented positions and years in these specifications.
The 1034 is an ANSI-standard bulb recognized in both the United States and Canada, operating on a 12-volt system with a dual-filament design rated at 21/5 watts.
The dual-filament construction of the 1034 allows it to serve two distinct brightness levels within a single bulb, a characteristic common to bulbs used in applications requiring both a running light and a brighter signal or stop function.
The 1034 uses a BAY15d bayonet base, which is an offset-pin bayonet mount. The offset pin placement means the bulb can only be inserted in one rotational orientation, preventing incorrect installation.
The 1034 is documented as a variant of the 1157 bulb. The 1157 is a widely used automotive bulb, and the 1034 shares its dual-filament, BAY15d configuration while differing in specific electrical output values.
For the Jeep CJ6A, the 1034 bulb size applies to both the front and rear turn signal positions for the 1966-1968 model years, indicating a uniform bulb specification across all four turn signal housings on the vehicle.