Fog Light Bulb

This procedure covers the removal and replacement of fog light bulbs on the 2025 Rivian EDV 500 commercial delivery van, including access through the front bumper area.

Warnings

Tools required

Parts

• Fog light bulb × 1 — Use OEM specification LED or halogen bulb

Preparation

1. Park vehicle on level surface and ensure high-voltage system is powered off
2. Allow fog lights to cool completely if vehicle was recently driven (wait at least 15 minutes)
3. Set parking brake and chock rear wheels
4. Open front cargo/hood area to access 12V battery if needed for extended work
5. Inspect the fog light housing location on the front bumper to determine access method

Procedure

1. 1

   Access wheel well liner
   Turn the steering wheel fully toward the opposite side of the fog light being replaced to maximize access. If replacing driver side fog light, turn wheel fully right; if replacing passenger side, turn wheel fully left. This exposes the front section of the wheel well liner.
2. 2

   Remove wheel well liner fasteners
   Locate the front portion of the inner wheel well liner. Remove the plastic push clips and T25 Torx screws securing the forward section of the liner. Typically 4-6 fasteners secure the front area. Gently pull the liner away from the bumper to create access to the fog light housing from behind.
3. 3

   Locate fog light housing
   Using a work light, identify the rear of the fog light housing through the wheel well opening. The fog light assembly is mounted in the lower front bumper. Trace the wiring harness from the housing to locate the electrical connector.
4. 4

   Disconnect fog light electrical connector
   Press the locking tab on the fog light electrical connector and gently pull the connector away from the bulb socket. On Rivian EDV models, this is typically a weatherproof connector with a sliding lock mechanism. Slide the lock tab first, then press the release and separate the connector.
5. 5

   Remove bulb retaining mechanism
   Depending on the fog light design, either rotate the bulb socket counterclockwise approximately 1/4 turn to unlock it from the housing, or release the wire spring clip by pressing and unhooking it. The EDV 500 typically uses a twist-lock socket design. Rotate counterclockwise until the socket releases.
6. 6

   Remove old bulb
   Carefully pull the bulb socket and bulb assembly out of the fog light housing. If the bulb is separate from the socket, gently pull the bulb straight out of the socket or release any retaining clips. Inspect the socket contacts for corrosion or damage.
7. 7

   Inspect fog light housing
   Before installing the new bulb, inspect the fog light housing interior for moisture, cracks, or debris. Check the housing seal and gasket for damage. Wipe any moisture or condensation with a clean, lint-free cloth. Verify the housing lens is not cracked or damaged.
8. 8

   Install new bulb
   Using clean gloves or a paper towel, handle the new fog light bulb only by its base. Insert the new bulb into the socket, ensuring proper alignment with any guide tabs or pins. For bulbs with multiple prongs, align correctly before fully seating the bulb. Press firmly until the bulb locks into the socket.
9. 9

   Install bulb and socket assembly
   Insert the bulb socket assembly into the fog light housing, aligning any guide tabs or alignment features. Rotate the socket clockwise approximately 1/4 turn until it locks securely into place. Ensure the socket is fully seated and cannot rotate further or pull out easily.
10. 10

    Reconnect electrical connector
    Reconnect the electrical connector to the fog light socket by aligning and pressing firmly until it clicks. Engage any locking tabs or sliding locks to secure the connection. Gently tug the connector to verify it is locked in place.
11. 11

    Test fog light operation
    Before reassembling the wheel well liner, power on the vehicle's 12V system and activate the fog lights using the light control switch. Verify the new fog light illuminates properly with correct brightness and beam pattern. Check for proper operation with both parking lights and low beams.
12. 12

    Reinstall wheel well liner
    Position the wheel well liner back into place, ensuring all edges are properly aligned with the bumper and fender. Reinstall all plastic push clips and T25 Torx screws in their original locations. Ensure the liner is secure and does not interfere with tire rotation. Return steering wheel to center position.

Reassembly

1. Verify all wheel well liner fasteners are installed and properly seated
2. Ensure no tools or parts remain in the wheel well area
3. Confirm fog light wiring is properly routed and not pinched by the liner
4. Check that the fog light beam pattern is correct and not aimed too high or low

Verification

• Turn on the vehicle and activate fog lights to confirm both fog lights illuminate with equal brightness
• Inspect for proper beam pattern alignment with vehicle parked 25 feet from a wall or garage door
• Verify no warning lights appear on the instrument cluster related to exterior lighting
• Check wheel well liner for secure fitment with no loose fasteners or gaps
• Test fog light operation with various lighting modes (parking lights, low beams, high beams) to ensure proper function

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