Lincoln Capri Back Up Light Bulb Size

The Lincoln Capri back up light bulb uses 3 different sizes: 1156, 1141, and 1129. A replacement chart documents bulb specifications across the 1952 to 1959 production range.

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

Bulb Size by Year Range

Years	Bulb Size
1959	1156
1956-1958	1141
1952-1955	1129

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1141
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.	1129

Other Locations

Additional Notes

The Lincoln Capri back up light specifications span model years 1952 through 1959, covering three distinct bulb types across that range.
The 1156 and 1141 are both ANSI-standard single-filament bulbs rated at 12V and 21W, sharing the BA15s bayonet base, which features a single locating pin on the base collar.
Although the 1156 and 1141 share the same base type, wattage, and voltage rating, they are distinct part numbers and are not listed as interchangeable within these specifications.
The 1129 is a dual-filament bulb rated at 12V with a 21/5W output, mounted on a BAY15d bayonet base, which uses two offset locating pins to prevent incorrect installation.
The BAY15d base of the 1129 is physically different from the BA15s base used by the 1156 and 1141, meaning the 1952-1955 bulbs are not socket-compatible with those used in 1956-1959 models.
The 1129 is noted as a variant of the 1157, a widely recognized dual-filament automotive bulb, though the 1129 carries its own distinct ANSI designation.
The Lincoln Capri (1952-1955) used the 1129 bulb for the back up light, making it the longest-running single bulb type across the listed model years at four consecutive years.
The 1141 bulb was fitted to the Lincoln Capri for the 1956-1958 model years, representing a transition from the dual-filament 1129 to a single-filament design with a different base type.
The 1959 Lincoln Capri shifted to the 1156 bulb, marking the only model year in these specifications to use that particular designation.
All three bulb types listed carry ANSI standardization applicable to both the United States and Canada, indicating conformance to a shared North American specification for automotive lighting.