For the 1999 Ford Crown Victoria, both the low-beam and high-beam headlights use a 9007 bulb. The supplied fitment data does not list a fog-light bulb for this model year.
Exterior lighting includes 3457A bulbs for the front turn signals and parking lights. The front and rear side markers use 194NA bulbs. At the rear, the reverse lights use 3156, while the brake and tail lights use red-tinted 3157R bulbs and the rear turn signals use amber 3157A bulbs. The center stop light uses a 912 bulb, and the license plate lights use 168.
Interior and auxiliary fitments include 906 for the dome and engine lights, 168 for the glove-box and map lights, and 211-2 for the trunk light. Courtesy lighting may use either 168 or 194; compare the original bulb before ordering. Instrument lighting may use 37, 161, or 194, so verify the original bulb for the specific application.