This procedure covers the removal and replacement of a generic relay in the 2024 Rivian EDV 500 electric delivery van, including proper high-voltage system safety protocols and relay identification.

Warnings

Tools required

Parts

• Replacement relay × 1 — Use OEM specification matching relay amperage and type

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn off all electrical accessories and remove key fob from vehicle
3. Open hood and locate the 12V battery in the front compartment
4. Disconnect the negative (-) terminal of the 12V battery and wait 2 minutes for system capacitors to discharge
5. Identify the specific relay to be replaced using the vehicle service manual or relay diagram on the fuse box cover
6. Photograph or document the relay location and orientation before removal
7. Verify the replacement relay matches the amperage rating and part number of the original relay

Procedure

1. 1

   Access the relay location
   Depending on relay location, remove any necessary covers or panels. For engine compartment relays, open the fuse/relay box cover. For cabin relays, remove the lower dashboard panel on driver side using trim removal tools. For relays in other locations, access according to the specific component location.
2. 2

   Verify system is de-energized
   Using a multimeter, verify that no voltage is present at the relay terminals. Set multimeter to DC voltage and test across relay terminals. There should be no voltage reading with the 12V battery disconnected.
3. 3

   Document relay configuration
   Before removing the relay, note its exact position, orientation, and terminal configuration. Take a photo if possible. Check the relay diagram on the fuse box cover or service manual to confirm the relay function and location.
4. 4

   Remove the faulty relay
   Grasp the relay firmly and pull straight up to remove it from its socket. If the relay is difficult to remove, use a relay puller tool to avoid bending pins or damaging the socket. For relays with mounting screws or clips, remove the fasteners first before pulling the relay.
5. 5

   Inspect relay socket and terminals
   Examine the relay socket for any signs of corrosion, burned contacts, melted plastic, or debris. Clean any corrosion with electrical contact cleaner. If socket terminals are damaged or loose, the relay box or harness connector may need replacement. Check socket pins for proper tension and alignment.
6. 6

   Compare old and new relays
   Verify the replacement relay matches the original in physical size, terminal configuration, amperage rating, and part number. The relay should have identical markings for voltage, amperage, and type (normally open, normally closed, or changeover). Do not substitute with an incorrect relay.
7. 7

   Apply dielectric grease
   Apply a small amount of dielectric grease to the relay terminals and socket contacts to prevent corrosion and ensure good electrical contact. Use sparingly - excessive grease can attract dirt and cause connection issues.
8. 8

   Install the new relay
   Align the new relay with the socket, ensuring correct orientation matching the original installation. The relay should only fit one way due to keyed terminal positions. Push firmly until the relay is fully seated in the socket with all terminals making contact. The relay should be flush with surrounding relays or sit at the same height as before removal.
9. 9

   Reinstall covers and panels
   Replace any fuse box covers, access panels, or trim pieces that were removed during access. Ensure all clips are properly engaged and covers are secured.
10. 10

    Reconnect 12V battery
    Reconnect the negative (-) terminal to the 12V battery. Ensure the terminal is clean and the connection is tight. The vehicle may perform initialization routines and warning lights may illuminate briefly on the dashboard.

Reassembly

1. Verify all covers, panels, and access points are properly secured
2. Ensure no tools or parts were left in the work area
3. Close the hood and ensure it is properly latched

Verification

• Turn the vehicle to ON mode (without engaging drive mode) and observe the dashboard for any warning lights related to the replaced relay circuit
• If the relay controls a specific function (cooling fans, fuel pump module, HVAC, etc.), test that function to ensure proper operation
• Listen for the relay clicking when its circuit is activated - this confirms the relay is receiving power and operating correctly
• Use a multimeter to verify proper voltage at relay terminals when the circuit is active, if accessible
• Test drive the vehicle to confirm all systems operate normally with no warning lights or fault codes
• If available, use a diagnostic scanner to check for any stored fault codes related to the relay circuit

More procedures for this vehicle