Ford Festiva high beam and low beam headlight bulbs both utilize a 9004 size. The replacement chart covers 1988 to 1993 vehicle production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford Festiva uses the 9004 bulb for both high beam and low beam headlights across its entire 1988-1993 production run.
The 9004 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments: one rated at 65 watts for high beam output and one rated at 45 watts for low beam output.
Because both beam functions share the same 9004 bulb, the Festiva does not use separate bulb housings for high and low beams.
The 9004 operates on a 12-volt electrical system, which is standard for passenger vehicles of this type.
The 9004 uses a P29t base, a three-contact connector that allows the vehicle's electrical system to activate either filament independently depending on the selected beam mode.
The 9004 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of performance and dimensional specifications rather than being a proprietary part.
The P29t base is not interchangeable with single-filament bases such as those found on H1 or H7 bulbs, and substituting a non-dual-filament bulb would require modifications to the socket or wiring.