Ford Contour Map Light Bulb Size

The Ford Contour map light requires a 578 bulb size for the interior lighting system. Data for the specific bulb requirements covers the range from 1999 to 2000.

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
1999-2000	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 578 bulb is the map light specification for the Ford Contour across the 1999-2000 model years.
The 578 is a festoon-type bulb, meaning it is cylindrical in shape and mounts by pressing its end caps into spring-loaded contacts rather than using a socket base.
The 578 operates at 12 volts and 12 watts, which is standard for low-current interior lighting applications in passenger vehicles.
The 578 has a 41mm length, which is a critical fitment factor, as festoon bulbs must match the span between the fixture's contact points to seat correctly.
The 578 carries ANSI designation, indicating it conforms to a standardized specification recognized in both the United States and Canada.