Toyota Van Back Up Light Bulb Size

The Toyota Van back up light utilizes 1156 and P21W bulb sizes for the rear illumination system. Data for the specific lighting components covers the period from 1984 through 1989.

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
1984-1989	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 Toyota Van uses the 1156 bulb across all listed model years, 1984-1989, for the back up light position.
The 1156 is an ANSI-standardized bulb type recognized across the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared by multiple manufacturers.
This bulb operates on a 12-volt circuit and draws 21 watts, which is consistent with standard automotive reverse lighting applications.
The 1156 is a single-filament bulb, meaning it serves only one lighting function rather than switching between two brightness levels as a dual-filament bulb would.
It uses a BA15s bayonet base, a single-contact mount where the bulb is inserted and rotated to lock into place, distinguishing it from the BA15d double-contact bayonet base used on dual-filament variants.
Because the BA15s and BA15d bases are physically similar but electrically different, substituting a double-contact bulb such as the 1157 in place of the 1156 is not a compatible swap for this application.