Turn Signal Bulb - Rear

This procedure covers the removal and replacement of the rear turn signal bulb assembly on the 2023 Rivian EDV 500 electric delivery van.

Warnings

Tools required

Parts

• Rear turn signal bulb or LED module assembly × 1 — Use OEM specification
• Trim panel clips (if damaged) × 5 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn off all lights and remove key fob from vehicle
3. Allow vehicle electrical system to enter sleep mode (wait 10 minutes after powering off)
4. Open rear cargo doors to access interior tail light mounting area
5. Clear cargo area near the affected tail light assembly for workspace

Procedure

1. 1

   Access interior cargo area panel
   From inside the cargo area, locate the interior trim panel covering the rear tail light assembly on the affected side. This panel is typically positioned on the rear pillar area behind the cargo doors.
2. 2

   Remove cargo area trim fasteners
   Using the T25 Torx driver, remove the trim panel fasteners securing the rear pillar trim panel. There are typically 3-4 fasteners. Store fasteners in a safe location and note their positions as some may be different lengths.
3. 3

   Release trim panel clips
   Using trim panel removal tools, carefully release the push-pin style clips securing the trim panel. Work from bottom to top, gently prying the panel away from the body. There are typically 5-7 clips along the panel edges. Apply steady pressure to avoid breaking clips.
4. 4

   Remove interior trim panel
   Once all fasteners and clips are released, carefully pull the trim panel away from the body. Watch for any wiring harnesses that may be routed behind the panel. Set the panel aside in a protected area to avoid scratches.
5. 5

   Locate tail light assembly mounting
   With the trim panel removed, identify the rear tail light assembly mounting nuts or bolts. The Rivian EDV 500 typically uses three 10mm mounting nuts accessible from inside the cargo area. Note the wiring harness connector location.
6. 6

   Disconnect wiring harness
   Locate the tail light wiring harness connector. Press the locking tab or release mechanism and carefully disconnect the connector from the tail light assembly. On some modules, you may need to rotate the connector counterclockwise before pulling.
7. 7

   Remove tail light mounting fasteners
   Using the 10mm socket and ratchet, remove the three mounting nuts securing the tail light assembly to the body. Support the tail light assembly from the exterior if possible, or have an assistant hold it to prevent it from falling when the last fastener is removed.
8. 8

   Remove tail light assembly
   Carefully pull the tail light assembly straight out from the exterior of the vehicle. The assembly may have alignment pins or weather seal gaskets that create resistance. Work the assembly gently to avoid damaging mounting points or the body panel.
9. 9

   Access turn signal module
   With the tail light assembly removed, identify the turn signal LED module or bulb socket. On the Rivian EDV 500, the turn signal is typically an integrated LED module. If replaceable, rotate the socket counterclockwise approximately 1/4 turn and pull to remove.
10. 10

    Replace turn signal component
    If the turn signal uses a replaceable bulb, remove the old bulb by pulling straight out or pressing and twisting counterclockwise depending on style. If the LED module is integrated, you may need to replace the entire tail light assembly. Install the new component ensuring proper orientation and seating.
11. 11

    Reinstall tail light assembly
    Position the tail light assembly back into the body opening, ensuring alignment pins and weather seal gasket are properly seated. From inside the cargo area, start all three mounting nuts by hand to ensure proper thread engagement.
12. 12

    Tighten mounting fasteners
    Using the 10mm socket and ratchet, tighten the three mounting nuts in a cross pattern to ensure even pressure on the assembly. Tighten snugly but do not overtighten as this can crack the plastic tail light housing. Apply approximately 5-7 ft-lbs of torque by feel.
13. 13

    Reconnect wiring harness
    Reconnect the tail light wiring harness connector, ensuring it clicks or locks into place securely. Verify the connection is fully seated and the locking tab is engaged.
14. 14

    Test turn signal operation
    Before reinstalling the trim panel, power on the vehicle and test the turn signal operation. Activate the turn signals and verify proper function of the repaired side. Also check brake light and running light functions to ensure the connector is properly seated.
15. 15

    Reinstall interior trim panel
    Position the interior trim panel back into place, ensuring any wiring is properly routed behind it. Press firmly along the edges to seat the push-pin clips. Reinstall all T25 Torx fasteners in their original locations and tighten securely.

Reassembly

1. Ensure all trim panel clips are fully seated and the panel is flush with surrounding surfaces
2. Verify all Torx fasteners are installed and properly tightened
3. Check that the tail light assembly weather seal is properly seated with no gaps
4. Close cargo doors and inspect exterior tail light alignment with body panels

Verification

• Power on the vehicle and cycle through all lighting functions: turn signals, brake lights, running lights, and reverse lights
• Walk around the vehicle to visually confirm the repaired turn signal operates with proper brightness and flash rate
• Verify no warning messages appear on the instrument cluster regarding lighting system faults
• Inspect the exterior tail light assembly for proper seating and alignment with body panels
• Check interior trim panel for secure fit with no rattles or loose clips

Related trouble codes on this vehicle

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