This procedure covers the removal and replacement of the engine bay fuse box (Integrated Power Module) on a 2014 Ram 2500 with 6.7L Cummins Diesel engine, including proper disconnection of electrical connections and battery isolation.

Warnings

Tools required

Parts

• Integrated Power Module (IPM/Fuse Box) × 1 — 68105502AG or equivalent OEM
• Fuse box cover seal (if damaged) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn ignition to OFF position and remove key
3. Turn off all electrical accessories including headlights, radio, and climate control
4. Open hood and secure with prop rod
5. Allow engine to cool completely if recently operated
6. Photograph the fuse box area from multiple angles for reference
7. Label all major electrical connectors with masking tape and marker if camera unavailable

Procedure

1. 1

   Disconnect battery negative terminal
   Locate the battery in the engine bay. Using a 10mm socket, loosen and remove the negative (-) battery terminal cable. Secure the cable away from the battery post to prevent accidental contact. Wait minimum 5 minutes for all electrical systems to fully discharge.
   Torque spec

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

   Remove fuse box cover
   Locate the engine bay fuse box (Integrated Power Module) on the driver's side inner fender area near the battery. Release the cover retention tabs by pressing or lifting as designed. Remove the cover and set aside. Note the location of all fuses and relays, photographing if necessary.
3. 3

   Document and remove fuses and relays
   Remove all fuses and relays from the fuse box using needle-nose pliers if needed. Place them in labeled containers or on a clean work surface in organized rows matching their original positions. Take detailed photographs showing which fuse/relay goes in each position.
4. 4

   Disconnect primary power feed cables
   Locate the large power feed cables entering the fuse box from the battery and alternator. Using appropriate size socket (typically 10mm or 13mm), remove the terminal bolts securing these cables to the fuse box. Support cable weight to prevent strain on connections. Mark each cable with tape indicating its position.
   ⚠These are high-amperage cables. Ensure battery is disconnected and do not allow cable ends to contact metal surfaces.
   Torque spec

   Battery Terminal Bolts6 Nm (4 lb-ft)
5. 5

   Disconnect electrical connectors
   Identify all electrical harness connectors plugged into the back and sides of the fuse box (typically 3-5 large multi-pin connectors). Press the release tabs and carefully disconnect each connector. Some connectors may have secondary locks that must be lifted first. Support the connector bodies, not the wires, when disconnecting.
6. 6

   Remove ground straps
   Locate ground strap connections on or near the fuse box mounting bracket. Using appropriate socket, remove the ground strap bolts. Clean the contact surfaces with wire brush to remove corrosion. Note the exact position and layering order of multiple ground straps if present.
   ℹ️Ground strap contact surfaces must be clean metal-to-metal for proper electrical system operation.
   Torque spec

   Ground Strap Bolts12 Nm (9 lb-ft)
7. 7

   Remove fuse box mounting bolts
   Locate the fuse box mounting bolts securing the unit to the inner fender or mounting bracket (typically 2-4 bolts). Using appropriate socket (likely 10mm or 13mm), remove all mounting bolts. Support the fuse box weight as you remove the final bolt.
   ⚠The fuse box is heavier than it appears due to internal components and attached cables. Support it properly during removal.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
8. 8

   Remove fuse box assembly
   Carefully maneuver the fuse box out of its mounting location. There may be additional wire harness clips or tie-downs that need to be released. Check for any remaining connections before fully removing the unit. Set the old fuse box on a clean work surface.
9. 9

   Prepare new fuse box for installation
   Inspect the new fuse box for correct part number match and verify all mounting bracket positions. Clean the mounting surface on the inner fender with electrical contact cleaner. Apply dielectric grease to large power terminal connections if desired. Transfer any remaining hardware from old unit if not included with new unit.
10. 10

    Install new fuse box assembly
    Position the new fuse box into the mounting location, ensuring proper alignment with mounting holes and clearance for all connectors. Thread mounting bolts by hand first to ensure proper alignment. Torque mounting bolts to specification in a cross pattern.
    Torque spec

    Module Mounting Bolts8 Nm (6 lb-ft)
11. 11

    Reconnect ground straps
    Reinstall ground straps in their exact original positions and layering order. Ensure clean metal-to-metal contact at all ground points. Torque ground strap bolts to specification. Verify no paint or debris between ground surfaces.
    Torque spec

    Ground Strap Bolts12 Nm (9 lb-ft)
12. 12

    Reconnect electrical harness connectors
    Using your photographs as reference, reconnect all electrical harness connectors to the fuse box. Push each connector firmly until you hear/feel it click into place. Engage any secondary locking tabs. Gently tug on each connector to verify secure connection. Route harnesses to avoid pinch points.
13. 13

    Reconnect power feed cables
    Reinstall the large power feed cables to the fuse box terminals in their correct positions using your labels/photos as reference. Ensure terminals are fully seated and torque terminal bolts to specification. Verify no cable strain or interference.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)
14. 14

    Reinstall fuses and relays
    Using your photographs and documentation, reinstall all fuses and relays into their correct positions in the new fuse box. Ensure each component is fully seated. Verify against the fuse box diagram on the cover if needed.
15. 15

    Reconnect battery and test
    Clean battery terminal posts and cable ends if needed. Reconnect the negative battery cable and torque battery terminal bolt to specification. Do not overtighten. Turn ignition to ON position (do not start) and verify all electrical systems initialize properly. Check for warning lights on instrument cluster.
    ⚠Do not overtighten battery terminal bolts as this can damage the battery post or cable terminal.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Reinstall fuse box cover ensuring all retention tabs engage properly
2. Verify no tools or parts left in engine bay
3. Perform complete electrical system functional test including lights, windows, radio, and all accessories
4. Start engine and verify proper charging system operation and no warning lights
5. Some vehicles may require dealer-level reprogramming or initialization after IPM replacement

Verification

• All electrical accessories function properly (lights, windows, wipers, radio, HVAC)
• No warning lights illuminated on instrument cluster with engine running
• Battery charging system operates correctly (13.5-14.5V with engine running)
• All fuses and relays properly seated and accounted for
• No loose connections or unsecured wiring harnesses
• Fuse box cover securely attached with all tabs engaged
• Ground connections are tight with clean metal-to-metal contact
• Test drive vehicle to verify all systems operate under load conditions

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