Freightliner Columbia Back Up Light Bulb Size

The Freightliner Columbia back up light uses bulb size 1156 for illumination purposes on the rear of the vehicle. Data for the specific component covers the range from 2005 to 2017.

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
2000-2017	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The Freightliner Columbia uses the 1156 bulb for its back up light across all listed model years from 2000-2017.
The 1156 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized industry standard applicable in both the United States and Canada.
This bulb operates on a 12-volt electrical system and draws 21 watts, which is consistent with standard incandescent automotive reverse light applications.
The 1156 uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin, as opposed to the dual-pin BA15d variant found in other bulb types.
Because the BA15s base has only one contact pin, the 1156 is a single-filament bulb, meaning it serves one lighting function rather than switching between two brightness levels.
The BA15s base of the 1156 is not interchangeable with visually similar bayonet-base bulbs that carry a dual-contact (BA15d) configuration, as the pin arrangements differ physically.