Buick Wildcat Map Light Bulb Size

The Buick Wildcat map light requires a bulb size of 90 for the interior lighting system. Data for the specified component covers the period from 1962 through 1968.

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
1962-1968	90

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 13W.	90

Other Locations

Additional Notes

The Buick Wildcat uses the ANSI 90 bulb for its map light across all model years from 1962 to 1968.
The 90 bulb is a single-filament type, meaning it serves one lighting function rather than switching between two brightness levels.
It operates on a 12-volt electrical system, which is standard for automotive applications of that era.
The 90 bulb carries a 13-watt rating, placing it in the low-wattage range typical of interior courtesy and reading lights.
The BA15s bayonet base is a single-contact bayonet fitting, distinguished from the dual-contact BA15d variant by its single pin offset on the base.
The BA15s base requires correct rotational alignment during installation, as the single pin engages a specific slot in the socket.
The 90 bulb conforms to ANSI standards recognized in both the United States and Canada, reflecting a shared North American automotive lighting specification.