Ford Windstar Map Light Bulb Size

The Ford Windstar map light requires a 578 bulb size for the interior lighting component located inside the cabin area. Data for the specific bulb requirements covers the period from 1995 through 2003.

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
1995-2003	578

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V, 12W.	578

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Additional Notes

The Ford Windstar uses the 578 bulb for the map light across all model years covered in the specifications, spanning 1995-2003.
The 578 is an ANSI-standardized bulb, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 578 is a festoon-type bulb, which is a cylindrical lamp that mounts by pressing its two end caps into spring-loaded holders rather than using a socket base.
The 578 bulb has a length of 41mm, a figure that is critical for fitment, as festoon bulbs must physically span the gap between their retaining clips.
The bulb operates at 12 volts, consistent with standard automotive electrical systems.
The 578 carries a 12-watt rating, which reflects its power consumption at the rated voltage.
Because the 578 is an ANSI-standardized part, bulbs from different manufacturers carrying the same designation share the same electrical and physical specifications, making cross-brand substitution straightforward within that standard.
The end-cap contact design of the 578 means electrical connection is made at both ends of the bulb body, a characteristic that distinguishes festoon types from wedge or bayonet base bulbs and affects which holder types are compatible.