Replace the fog light bulb on a 2011-2014 Ford F-150 3.5L EcoBoost 4WD by accessing the bulb assembly from behind the front bumper.

Warnings

Tools required

Parts

• Fog light bulb H10 or 9145 × 1 — H10 or 9145 halogen bulb

Preparation

1. Turn off the vehicle and remove the key from the ignition
2. Turn the fog light switch to the OFF position
3. Allow fog lights to cool completely if recently used
4. Turn the steering wheel fully to the side opposite the fog light being replaced for better access

Procedure

1. 1

   Access fog light assembly
   From underneath the front of the vehicle, locate the fog light housing behind the front bumper. The fog light is positioned in the lower fascia and can be accessed from the wheel well area or directly from underneath.
2. 2

   Locate bulb socket
   Identify the electrical connector and bulb socket at the rear of the fog light housing. The socket is a twist-lock design that protrudes from the back of the housing assembly.
3. 3

   Disconnect electrical connector
   Press the release tab on the electrical connector and pull it straight away from the bulb socket to disconnect. Set the connector aside in a clean area where it won't get contaminated with dirt.
4. 4

   Remove bulb socket
   Rotate the bulb socket counterclockwise approximately 1/4 turn until it releases from the fog light housing. Pull the socket and bulb assembly straight out of the housing.
5. 5

   Remove old bulb
   Pull the old H10/9145 bulb straight out of the socket. The bulb uses a wedge-style base and should pull free without rotation. Inspect the socket for any corrosion or damage.
6. 6

   Install new bulb
   Using a clean cloth or gloves to avoid touching the glass, insert the new H10/9145 bulb into the socket by aligning the base tabs and pushing firmly until it seats completely. Ensure the bulb is fully seated in the socket.
7. 7

   Reinstall bulb socket
   Insert the bulb socket assembly back into the fog light housing and rotate clockwise approximately 1/4 turn until it locks into place. Verify the socket is secure by gently pulling on it.
8. 8

   Reconnect electrical connector
   Push the electrical connector onto the bulb socket until you hear or feel a positive click, confirming the connector is fully seated and locked.

Reassembly

1. Return the steering wheel to the centered position
2. Ensure no tools or materials are left in the wheel well or under the vehicle

Verification

• Start the vehicle and turn on the fog lights to verify the new bulb illuminates properly
• Check that the fog light beam pattern is correct and both fog lights match in brightness if only one was replaced
• Visually inspect from outside the vehicle to confirm proper operation

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