This procedure covers the removal and replacement of the interior fuse box (central junction box) located in the passenger compartment of the 2011-2014 Ford F-150.

Warnings

Tools required

Parts

• Interior fuse box assembly × 1 — Use OEM Ford CJB for specific vehicle configuration
• Fuse box cover clips (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. Disconnect negative battery terminal and secure cable away from battery post
4. Wait minimum 2 minutes for capacitor discharge and system power-down
5. Photograph or label all fuse positions and any connected wiring harnesses for reference
6. Gather all tools and new fuse box assembly
7. Ensure interior lighting is adequate or position work light

Procedure

1. 1

   Access the interior fuse box
   The interior fuse box is located under the right side of the instrument panel. Open the passenger door fully. Remove the fuse box cover by pulling the cover release tab and rotating the cover downward. Fully remove the cover and set aside.
2. 2

   Remove lower instrument panel trim
   Locate and remove the lower right instrument panel trim piece to access the fuse box mounting area. This trim panel is typically held by several plastic clips. Use trim removal tools to carefully release the clips starting from the bottom edge and working upward. Pull the panel away gently to avoid breaking clips.
3. 3

   Document fuse and relay positions
   Before removing any fuses or relays, take detailed photographs of the fuse box showing all installed fuses and relays in their current positions. Create a written diagram if necessary. This documentation is critical for proper reinstallation.
4. 4

   Remove all fuses and relays
   Using a fuse puller or small flathead screwdriver, carefully remove all fuses and relays from the interior fuse box. Place them in organized groups corresponding to their locations. Inspect each fuse for condition while removed.
5. 5

   Disconnect main electrical connectors
   Locate the large multi-pin electrical connectors on the back and sides of the fuse box. There are typically 4-6 main connectors. Press the connector release tabs and carefully pull each connector straight out from the fuse box. Take photos of each connector position before removal. Label connectors if needed.
6. 6

   Remove ground strap connection
   Locate the ground strap(s) attached to the fuse box mounting bracket. Remove the ground strap bolt(s) and disconnect the ground connection. Ensure the mating surface is clean and free of corrosion.
   Torque spec

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

   Remove fuse box mounting bolts
   Locate the fuse box mounting bolts securing the assembly to the instrument panel support structure. There are typically 3-4 bolts accessible from the front and side. Remove these mounting bolts completely and retain them for reinstallation.
   Torque spec

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

   Remove interior fuse box assembly
   With all connectors and mounting bolts removed, carefully maneuver the fuse box assembly out of its mounting position. The assembly may need to be tilted or rotated to clear surrounding components. Work slowly to avoid damaging nearby wiring or trim.
9. 9

   Inspect and prepare new fuse box
   Inspect the new fuse box assembly to verify it matches the removed unit exactly. Check all connector positions and mounting hole locations. Verify the part number matches your vehicle configuration. Clean any connector pins on the new assembly if needed with electrical contact cleaner.
10. 10

    Install new fuse box assembly
    Position the new fuse box assembly into the mounting location, carefully aligning it with mounting holes and connector access points. Ensure no wiring harnesses are pinched behind the assembly. Orient the assembly exactly as the original was positioned.
11. 11

    Install mounting bolts
    Install all fuse box mounting bolts finger-tight first to ensure proper alignment. Once all bolts are started, torque the mounting bolts to specification in a cross-pattern sequence to ensure even seating of the assembly.
    Torque spec

    Module Mounting Bolts8 Nm (6 lb-ft)
12. 12

    Reconnect ground strap
    Reconnect the ground strap(s) to the fuse box mounting bracket. Ensure mating surfaces are clean and make good metal-to-metal contact. Install and torque the ground strap bolts to specification.
    Torque spec

    Ground Strap Bolts12 Nm (9 lb-ft)
13. 13

    Reconnect electrical connectors
    Reconnect all main electrical connectors to the fuse box, referring to your photos for correct positioning. Push each connector firmly until you hear or feel a positive click indicating the locking tab has engaged. Verify each connector is fully seated.
14. 14

    Reinstall fuses and relays
    Using your documentation from removal, reinstall all fuses and relays into their correct positions in the new fuse box. Ensure each fuse and relay is fully seated. Double-check positions against your reference photos or diagram.
15. 15

    Reconnect battery and test
    Reconnect the negative battery terminal and torque the battery terminal bolt to specification. Turn the ignition to ON position (do not start engine yet) and verify that instrument panel lights illuminate properly. Check for any warning lights or fault indicators.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Reinstall lower instrument panel trim piece by aligning clips and pressing firmly until all clips engage
2. Install the fuse box cover by aligning the hinge and rotating upward until the locking tab engages
3. Test all electrical functions systematically: lights, windows, HVAC, radio, power locks, wipers, etc.
4. If any functions do not work, verify fuse/relay positions and connector engagement before proceeding
5. Clear any diagnostic trouble codes that may have been set during the procedure

Verification

• Turn ignition to ON position and verify all instrument cluster warning lights perform normal bulb check
• Start engine and verify it runs normally without warning lights
• Test all interior electrical functions: dome lights, power windows, power locks, HVAC blower and controls
• Test exterior lighting: headlights, turn signals, brake lights, reverse lights
• Verify power mirrors, radio, and all accessory power outlets function properly
• Check for any stored diagnostic trouble codes using a scan tool
• Verify all fuses and relays are properly seated and the fuse box cover is secure
• Test drive vehicle briefly to confirm all electrical systems function normally under operation

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