This procedure covers the replacement of a generic relay in the 2022 Rivian EDV 500 electric delivery van, including locating the relay, safely disconnecting the electrical system, and installing a replacement component.

Warnings

Tools required

Parts

• Replacement relay × 1 — Use OEM specification - match amperage and voltage rating
• Dielectric grease × 1 — Use OEM specification

Preparation

1. Park vehicle on a level surface and engage parking brake
2. Turn off all vehicle systems using the power button
3. Ensure vehicle has been off for at least 5 minutes
4. Locate the specific relay requiring replacement using the vehicle wiring diagram or owners manual - common locations include under-hood fuse/relay box, cabin fuse panel, or auxiliary relay panels in cargo area
5. Photograph relay location and orientation for reference during installation
6. Gather all tools and replacement parts

Procedure

1. 1

   Disconnect 12V battery
   Open the front hood or access panel to locate the 12V auxiliary battery. Using appropriate socket, loosen and remove the negative terminal connection. Secure the cable away from the battery post to prevent accidental reconnection. Wait minimum 5 minutes for system capacitors to discharge.
   ⚠Do not disconnect the high voltage battery - only the 12V auxiliary battery is required for relay replacement.
2. 2

   Access relay panel
   Depending on relay location, remove the appropriate cover. For under-hood relays, unlatch and remove the fuse box cover. For cabin relays, remove lower dashboard trim panels using plastic trim tools. For cargo area relays, remove side panel trim or access covers. Consult vehicle service information for specific relay location.
   ⚠Trim clips can break easily - use proper plastic trim tools and gentle prying motion.
3. 3

   Identify target relay
   Locate the specific relay to be replaced using the relay diagram on the fuse box cover or vehicle service information. Verify relay identification by checking the label or position number. Note the relay amperage rating and type (micro, mini, standard, or ISO relay) stamped on the relay body.
4. 4

   Test relay circuit (optional diagnostic step)
   If diagnosing a faulty relay, use digital multimeter to test circuit voltage and continuity. Check for battery voltage at the relay socket power supply terminals. Verify ground circuit continuity. Check control circuit for proper signal voltage when relay should be energized. This confirms whether relay or circuit is at fault.
5. 5

   Remove faulty relay
   Grasp the relay body firmly and pull straight up with steady pressure to remove from socket. For relays with locking tabs, depress the tab while pulling. If relay is difficult to remove, use relay puller tool or needle nose pliers to grip relay body - never pull on wiring. Inspect relay terminals for corrosion or burn marks.
6. 6

   Inspect relay socket
   Examine the relay socket terminals for corrosion, melting, discoloration, or damage. Check for loose or spread terminals. Use compressed air to remove any debris from socket. If terminals show heat damage or corrosion, clean with electrical contact cleaner and fine wire brush, or replace relay socket assembly if severely damaged.
   ⚠Damaged socket terminals can cause poor connection and relay failure. Socket replacement may be necessary if terminals are burned or loose.
7. 7

   Verify replacement relay specifications
   Compare new relay specifications with original relay. Verify voltage rating (typically 12V), current rating (amperage), and terminal configuration match exactly. Check that relay type (normally open, normally closed, or changeover) matches original. Ensure physical size and terminal spacing are identical.
   ⚠Installing incorrect relay type or amperage rating can cause system malfunction or electrical damage.
8. 8

   Apply dielectric grease
   Apply a small amount of dielectric grease to the relay terminals. This protects against corrosion and ensures proper electrical contact. Do not over-apply - a thin coating on each terminal is sufficient.
9. 9

   Install new relay
   Align the new relay with the socket, ensuring proper orientation by matching terminal positions. Press relay firmly into socket until it seats completely and sits flush with surrounding relays. Verify relay is fully inserted and locking tabs (if present) are engaged. Relay should be secure with no wiggle or movement.
10. 10

    Reconnect 12V battery
    Return to 12V auxiliary battery location. Clean battery terminals if corroded. Reconnect negative terminal and tighten to secure connection. Ensure cable connection is tight and terminal cannot be moved by hand.
11. 11

    Reinstall covers and panels
    Replace all fuse box covers, trim panels, or access panels removed during relay access. Ensure all clips are properly seated and panels are secure. Verify no gaps or misalignment in trim pieces.

Reassembly

1. Ensure all trim panels and covers are properly secured and aligned
2. Verify no tools or parts were left in relay compartment or electrical panels
3. Confirm relay is fully seated and secure in socket

Verification

• Power on the vehicle and verify all dash warning lights cycle normally during startup sequence
• Test the specific system controlled by the replaced relay to confirm proper operation
• Listen for relay clicking sound when system is activated (if audible from relay location)
• Check that no new warning messages appear on instrument cluster
• Verify all other vehicle electrical systems function normally
• If relay controlled an external component (lights, fans, etc.), verify that component operates correctly
• Use diagnostic scan tool if available to check for any stored fault codes related to the relay circuit

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