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Used for: Headlight Bulb High Beam and Low Beam
Used for: Back Up Reverse Light Bulb
Used for: Brake Light Bulb, Tail Light Bulb
Used for: Center High Mount Stop Light Bulb, Trunk or Cargo Area Light
Used for: License Plate Light Bulb
Used for: License Plate Light Bulb
Used for: Parking Light Bulb, Turn Signal Light Bulb Front
Used for: Side Marker Light Bulb Front
Used for: Turn Signal Light Bulb Rear
Used for: Dome Light Bulb
Used for: Map Light Bulb
This 2004 Ford F-150 bulb guide is designed to help you verify the correct bulb size by lighting position before you buy replacements. Whether you are changing a headlight, a tail light, or a small interior lamp, matching the bulb to the exact location is the easiest way to avoid fitment mistakes.
Use this page as a quick reference for the most common exterior and interior bulbs on the 2004 Ford F-150. The truck can use different bulb setups depending on trim, body style, and lighting package, so checking the position-specific listing is more reliable than guessing by appearance alone.
For best results, compare the bulb in your truck with the listed size before ordering, especially if your F-150 has had prior repairs or aftermarket lighting installed. Trim and package differences can affect fitment, and halogen-to-LED conversions may require different bulbs, resistors, or housings to work correctly. If you are unsure, remove the installed bulb and read the number on the base, then confirm it against the chart before purchase.
The listed headlight bulb for both high beam and low beam on this page is H13. Always confirm the bulb in your specific truck, since lighting equipment can vary by market and trim.
The front turn signal bulb is listed as 3157A. This same bulb size is also shown for the front parking light position on this page.
The rear turn signal bulb is listed as 3157. Check the lens and socket condition when replacing it, especially if the bulb has been running hot or the connector shows corrosion.
Both the brake light and tail light bulb positions are listed as 3157R. On many trucks, the same bulb type is used for both functions in the rear lamp assembly.
The back up reverse light bulb is listed as 3156. If one reverse light is out, it is usually a good idea to replace both sides at the same time.
The license plate light bulb is listed as 194 or 7441. Since either size may appear in this position, it is smart to verify the installed bulb before ordering.
The dome light bulb is listed as 578. This is a common interior bulb, but checking the existing bulb is still recommended if the truck has been modified.
The map light bulb is listed as 906. If your overhead console has been changed or upgraded, confirm the socket style before buying replacements.
The center high mount stop light bulb is listed as 921. This is the third brake light mounted higher in the cab, and it is separate from the main tail/brake lamps.
The front side marker light bulb is listed as 194NA. This bulb is specific to the front marker position shown on the page.
Not always. Trim level, cab style, body style, and lighting package can change the bulb setup, so the position-based listing on this page is the safest reference.
Yes, many owners switch to LED bulbs, but fitment and function can vary. Some LED replacements may need load resistors or compatible housings to prevent hyperflash, warning lights, or uneven beam pattern.
Yes. Checking the installed bulb is the best way to confirm fitment, especially on used trucks or vehicles with aftermarket lighting. It helps avoid ordering the wrong bulb size.