This procedure covers the removal and replacement of a relay in the 2012-2018 Jeep Wrangler JK with the 3.6L V6 engine, applicable to relays located in the engine compartment power distribution center or interior fuse panel.

Warnings

Tools required

Parts

• Relay (specific to circuit being repaired) × 1 — Use OEM specification - verify relay amperage and type from fuse box diagram

Preparation

1. Identify which relay needs replacement by consulting the fuse box diagram on the inside of the PDC cover or in the owner's manual
2. Verify the correct replacement relay type and amperage rating
3. Ensure the ignition is OFF and the key is removed from the vehicle
4. Allow engine to cool if working in the engine compartment to avoid burns from hot components

Procedure

1. 1

   Disconnect battery negative terminal
   Using a 10mm socket, loosen the battery negative terminal bolt and remove the negative cable from the battery. Secure the cable away from the battery terminal to prevent accidental reconnection.
   Torque spec

   Battery Terminal Bolts8 Nm (6 lb-ft)
2. 2

   Locate the target relay
   For engine compartment relays: Open the hood and locate the Power Distribution Center (PDC) on the driver side firewall near the battery. For interior relays: Open the driver door and locate the fuse panel on the left side of the dashboard. Remove the cover by pressing the release tabs or removing screws if equipped. Use the diagram on the cover or in the owner's manual to identify the specific relay position.
3. 3

   Remove PDC cover if applicable
   If accessing the engine compartment PDC, press the locking tabs on both sides of the cover and lift upward to remove. Set the cover aside in a clean location with the diagram facing up for reference.
   Torque spec

   Cover Screws12 Nm (9 lb-ft)
4. 4

   Inspect relay and socket condition
   Before removal, visually inspect the relay and socket for signs of heat damage, corrosion, melted plastic, or burned terminals. If the socket shows damage, the entire PDC or fuse panel may require replacement. Take a photo of the relay orientation if it has directional markings.
5. 5

   Remove the faulty relay
   Using a relay puller tool or needle-nose pliers, grasp the relay body firmly and pull straight upward with steady pressure. Do not rock or twist the relay as this can damage the socket terminals. Some relays may have a locking tab that must be pressed before removal. Avoid touching the relay terminals with bare hands to prevent oil contamination.
6. 6

   Inspect socket terminals
   Examine the socket terminals for corrosion, bending, or damage. Use a flashlight to look inside the socket. If terminals appear corroded, use electrical contact cleaner and allow to dry completely. Bent terminals should be carefully straightened with needle-nose pliers. If terminals are severely damaged, the socket assembly requires replacement.
7. 7

   Install new relay
   Verify the new relay matches the old relay's part number, terminal configuration, and amperage rating. Optionally apply a small amount of dielectric grease to the relay terminals. Align the relay terminals with the socket, ensuring correct orientation per any markings or keying features. Press the relay firmly into the socket until it is fully seated and flush with surrounding relays. The relay should click or snap into place.
8. 8

   Reinstall covers
   Replace the PDC cover or interior fuse panel cover, ensuring all locking tabs engage fully. If the cover has screws, install them and tighten evenly to the specified torque to avoid cracking the plastic.
   Torque spec

   Cover Screws12 Nm (9 lb-ft)
9. 9

   Reconnect battery negative terminal
   Place the negative battery cable back onto the battery negative terminal. Install the terminal bolt and tighten to the specified torque. Ensure the connection is secure but do not overtighten as this can damage the battery terminal or cable.
   Torque spec

   Battery Terminal Bolts8 Nm (6 lb-ft)

Reassembly

1. Ensure all covers are properly secured and latched to prevent water intrusion and dust contamination
2. After reconnecting the battery, vehicle systems may require initialization including power windows, radio presets, and clock

Verification

• Turn the ignition to ON position (engine off) and verify that the affected system or component now functions properly
• Start the engine and confirm normal operation of the circuit controlled by the replaced relay
• Check for any warning lights on the instrument cluster related to the affected system
• If available, use a multimeter to verify proper voltage at the relay socket terminals with the system activated
• Perform a test drive if the relay controls a driving-related function (fuel pump, cooling fans, etc.) to ensure proper operation under load

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