Ford Escort Back Up Light Bulb Size

The Ford Escort back up light utilizes bulb sizes 1141, 1156, 2356, 2456, 3156, and P21W depending on the specific version of the vehicle. Available data for the components spans from 1956 through 2003.

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
2003	2456
2002	3156
2001	2356
1999-2000	2456
1998	3156
1997	2356
1981-1993	1156
1956-1957	1141

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, specialty application. 12V.	2456
ANSI standard (US & Canada). Single-filament wedge bulb (T25). 12V, 27W.	3156
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V.	2356
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

Other Locations

Additional Notes

The Ford Escort back up light specifications cover model years 1956-1957 and 1981-2003, with four distinct bulb types appearing across that span: 1141, 1156, 2356, 2456, and 3156.
The 1156 bulb is the most frequently specified type in the Ford Escort back up light data, covering model years 1981-1993. It is a single-filament bulb with a BA15s bayonet base rated at 12V and 21W.
The 1141 bulb, specified for the 1956-1957 Ford Escort, shares the same BA15s bayonet base, single-filament design, 12V rating, and 21W output as the 1156. Despite these similarities, the two are separate ANSI designations and are not confirmed as interchangeable within these specifications.
The 3156 is a single-filament wedge bulb of the T25 form factor, rated at 12V and 27W. It is specified for the 1998 and 2002 model years. Its wedge base differs fundamentally from the bayonet base found on the 1156 and 1141, making cross-substitution physically incompatible.
The 2356 is a dual-filament bulb with a BAY15d bayonet base, specified for the 1997 and 2001 model years. The BAY15d base is offset-pin, distinguishing it from the single-pin BA15s base used by the 1156 and 1141, which prevents interchangeability between those types.
The 2456 is a festoon-style bulb rated at 12V, designated for specialty applications under the ANSI standard. It is specified for the 1999, 2000, and 2003 Ford Escort back up light positions. Its festoon form factor is physically distinct from both wedge and bayonet base types present elsewhere in these specifications.
The 1997-2003 model years reflect notable variation, with three different bulb types (2356, 3156, and 2456) appearing across just seven consecutive years, indicating that fitment is strictly year-specific for that period.
All five bulb types in these specifications carry ANSI designations valid for both the United States and Canada, meaning the sizing standards apply uniformly across both markets.
The 2356 dual-filament construction differs functionally from the single-filament 3156, even though both appear in adjacent model years of the same application. Using a dual-filament bulb in a single-filament socket, or vice versa, presents a wiring and fitment mismatch.
Because the Ford Escort back up light position uses five different bulb types across its model year range, year-specific verification is necessary before any bulb replacement, as no single bulb type covers the full production span.