Ford F-150 Cornering Bulb Size

The Ford F-150 cornering light utilizes 3156 and 2456 bulb sizes depending on the specific application for the vehicle. Data for the bulb sizes covers the range from 1992 to 1993.

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
1993	3156
1992	2456

Bulb Specifications

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

Other Locations

Additional Notes

The 1993 Ford F-150 uses a 3156 bulb for the cornering position, while the 1992 model uses a 2456 bulb. These two model years require different bulb types and are not interchangeable with each other.
The 3156 is an ANSI-standardized single-filament wedge bulb in a T25 form factor, rated at 12V and 27W. The T25 designation refers to the bulb's tubular shape, with the number indicating its width in eighths of an inch.
The 2456 is an ANSI-standardized festoon bulb rated at 12V. Festoon bulbs are cylindrical in shape and mount by contact pressure at each end rather than by a base socket, which is a fundamentally different mounting method from the wedge-style 3156.
Both the 3156 and 2456 are standardized under ANSI specifications applicable in the United States and Canada, meaning replacements sourced within those markets should conform to consistent electrical and physical standards.
The single-filament design of the 3156 means it serves one lighting function only, as opposed to dual-filament bulbs that can serve two functions such as running and braking from a single unit.