This procedure covers the replacement of fog light bulbs on a 2015-2020 Ford F-150 with 5.0L V8 engine, requiring access from underneath or through the wheel well.

Warnings

Tools required

Parts

• H10 fog light bulb (9145) × 1 — H10 or 9145 halogen bulb, 42W

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn off fog lights and allow to cool for at least 10 minutes if recently used
3. Determine access method: some F-150 configurations allow access from underneath, others require partial wheel well liner removal
4. If accessing through wheel well, turn steering wheel fully to opposite side of bulb being replaced for better access

Procedure

1. 1

   Access fog light assembly
   From underneath the front bumper or through the wheel well opening, locate the fog light assembly on the affected side. If necessary, carefully pull back the plastic inner fender liner to expose the rear of the fog light housing. Some models have a small access panel that can be removed without disturbing the entire liner.
2. 2

   Disconnect electrical connector
   Locate the electrical connector on the back of the fog light bulb socket. Press the release tab on the connector and pull it straight off the bulb socket. Do not pull on the wires themselves. If the connector is stuck due to corrosion, gently wiggle while pulling.
3. 3

   Remove bulb socket
   Rotate the bulb socket counterclockwise approximately 1/4 turn (90 degrees) until it releases from the fog light housing. Pull the socket straight out of the housing. Note the orientation of the socket for reinstallation.
4. 4

   Remove old bulb from socket
   The H10 bulb is a wedge-type design. Gently pull the old bulb straight out of the socket. If the bulb is stuck, gently wiggle while pulling. Inspect the socket for any corrosion, moisture, or damage. Clean any corrosion with electrical contact cleaner if present.
5. 5

   Install new bulb
   Using a clean cloth or the packaging, handle the new H10 bulb without touching the glass. Insert the new bulb into the socket, ensuring the tabs on the bulb base align with the slots in the socket. Push firmly until the bulb is fully seated in the socket.
6. 6

   Reinstall bulb socket into housing
   Insert the bulb socket back into the fog light housing, aligning the tabs on the socket with the slots in the housing. Push the socket in fully, then rotate clockwise approximately 1/4 turn until it locks into place. Ensure the socket is secure and cannot be pulled out.
7. 7

   Reconnect electrical connector
   Push the electrical connector onto the bulb socket until you hear or feel a positive click, indicating the locking tab has engaged. Gently tug on the connector to verify it is securely attached.
8. 8

   Restore wheel well liner
   If the inner fender liner was pulled back or removed, reinstall it to its original position. Ensure all clips and fasteners are properly seated to prevent wind noise and to protect components from road debris.

Reassembly

1. Ensure wheel well liner is properly secured if it was disturbed during access
2. Verify all clips and fasteners are in place to prevent rattles or liner separation

Verification

• Turn ignition to ON position and activate fog lights using the headlight control stalk or switch
• Visually confirm the new fog light illuminates with proper brightness matching the opposite side
• Walk around vehicle to verify beam pattern appears correct and fog light housing is properly seated
• Check for any warning lights on the instrument cluster that might indicate a bulb or electrical issue
• Test both fog lights on and off several times to ensure proper operation

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