Volvo 760 Back Up Light Bulb Size

The Volvo 760 back up light utilizes P21W and 1156 bulb sizes for the rear illumination system. Available information for the specified lighting components covers the period from 1983 to 1990.

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
1983-1990	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 1156 is the sole back up light bulb size specified for the Volvo 760 across its entire production run of 1983-1990.
The 1156 is an ANSI-standardized bulb, meaning it conforms to a defined set of electrical and physical specifications recognized across the United States and Canada.
The 1156 operates on a 12-volt electrical system and draws 21 watts, which is typical for incandescent automotive reverse lighting applications.
The 1156 uses a single filament, meaning it serves one lighting function only, as opposed to dual-filament bulbs that handle two functions such as braking and running light from a single unit.
The base type on the 1156 is a BA15s bayonet mount, where "BA15" refers to the 15mm base width and "s" denotes a single contact pin, distinguishing it from the BA15d, which carries two offset pins for dual-filament use.
The BA15s single-contact base on the 1156 is not interchangeable with visually similar bulbs that use a BA15d base, as the pin configuration differs and the socket will not accept the wrong type correctly.