Relay - Generic

This procedure covers the removal and replacement of a relay in the Power Distribution Center (PDC) or Integrated Power Module (IPM) on a 2014 Ram 2500 with 6.7L Cummins diesel engine.

Warnings

Tools required

Parts

• Relay (specific to circuit being repaired) × 1 — Use OEM specification - varies by relay location

Preparation

1. Turn off the ignition and remove the key
2. Allow engine to cool if recently operated
3. Open the hood and secure with prop rod
4. Locate the Power Distribution Center on the driver's side of the engine compartment near the battery
5. Reference the relay identification chart on the underside of the PDC cover or in the owner's manual to identify the specific relay location

Procedure

1. 1

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

   Battery Terminal Bolts6 Nm (4 lb-ft)
2. 2

   Remove PDC or IPM cover
   Release the cover latches by pressing the tabs on each side of the Power Distribution Center cover. Lift the cover straight up to remove. If accessing relays inside the cab, locate and remove the fuse panel cover by pulling gently on the edges.
3. 3

   Identify target relay
   Reference the relay diagram on the underside of the cover or in the service manual to identify the exact relay position. Note the relay orientation and terminal configuration before removal. Common relays include fuel pump, starter, cooling fan, and various accessory circuits.
4. 4

   Remove failed relay
   Using a relay puller tool or needle nose pliers, grasp the relay body firmly and pull straight up with steady pressure. Rock gently side-to-side if needed, but do not bend the relay or socket terminals. Inspect the socket terminals for corrosion, burning, or damage.
5. 5

   Inspect relay socket
   Examine the relay socket for signs of heat damage, corrosion, or pushed-back terminals. If terminals are damaged or corroded, the entire PDC or socket may require replacement. Clean any light corrosion with electrical contact cleaner and allow to dry completely.
6. 6

   Install new relay
   Align the new relay with the socket, ensuring correct orientation by matching the relay tab or terminal configuration to the socket. Press the relay straight down into the socket with firm, even pressure until it seats completely. The relay should sit flush with surrounding relays.
7. 7

   Reinstall cover
   Position the PDC or fuse panel cover back onto the housing, ensuring the relay diagram is visible. Press down on all four corners until the latches click into place securely. Verify the cover is fully seated and weather seal is intact.
8. 8

   Reconnect battery
   Clean the battery terminal and cable end if needed. Reconnect the negative battery cable to the negative battery post and tighten the terminal bolt to specification. Ensure the connection is tight and secure.
   Torque spec

   Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Ensure PDC or fuse panel cover is fully latched and sealed
2. Verify battery connection is clean and tight to specification
3. Close and secure the hood

Verification

• Turn the ignition to the ON position without starting the engine and verify the malfunction indicator lamp or warning lights extinguish as expected
• Start the engine and verify the affected circuit or component operates correctly
• If replacing a fuel pump relay, listen for fuel pump priming when ignition is turned on
• Use a scan tool to check for any stored diagnostic trouble codes related to the relay circuit
• Test the affected system under normal operating conditions to confirm proper function
• Verify no blown fuses or additional relay failures occurred

Related trouble codes on this vehicle

Codes that commonly send this job to the bay — tap one for symptoms, causes, and diagnostic steps.

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