Fuse Box - Interior

Remove and replace the interior fuse box on a 2009 Aston Martin DB9, located in the driver's side footwell area behind trim panels.

Warnings

Tools required

Parts

• Interior fuse box assembly × 1 — Use OEM specification
• Trim panel clips (replacement for broken) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and ensure ignition is off
2. Wait 5 minutes after shutting off ignition to allow modules to enter sleep mode
3. Open driver's door and lower driver's side window (power windows will be inoperable after battery disconnect)
4. Note radio security code from owner's manual or retrieve from dealer if not documented

Procedure

1. 1

   Disconnect Battery
   Open the boot (trunk) and locate the battery, which on the DB9 is mounted in the rear luggage compartment. Loosen and remove the negative terminal bolt using the appropriate socket (verify size on vehicle). Disconnect negative cable and isolate from battery post. Wait 3 minutes for capacitive discharge in electrical system. Note: Open the trunk/boot and locate the battery (the DB9 battery is mounted in the luggage compartment, not the engine bay). Loosen and remove the negative terminal bolt using a 10mm socket. Disconnect the negative cable and isolate it from the battery post. Wait 3 minutes for capacitive discharge in the electrical system.
   Torque spec

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

   Remove Driver's Side Lower Trim Panel
   From driver's footwell, locate the lower trim panel covering the fuse box area (left of steering column, below dash). Using plastic trim tools, carefully release the trim clips around the perimeter of the panel. Verify the exact clip count and type against 2009 DB9 trim documentation before removal. Pull panel away gently to avoid breaking clips. Set panel aside with clips attached if possible.
3. 3

   Access Fuse Box Mounting
   With lower trim removed, the interior fuse box will be visible mounted to the body structure. Use flashlight to identify all mounting fasteners and electrical connectors. The fuse box mounting fastener count/type and the number of multi-pin connectors must be verified against 2009 DB9 service documentation before proceeding. Note: The fuse box mounting fastener count/type and connector count must be verified against 2009 DB9 service documentation before proceeding, as these details are not confirmed for this platform. Note: The fuse box is secured by mounting fasteners and has multiple large multi-pin connectors on the rear; verify the exact fastener type/count and connector count against 2009 DB9 OEM documentation before proceeding.
4. 4

   Disconnect Electrical Connectors
   Identify the large multi-pin connectors at the rear of the fuse box. Each connector has a locking tab or slider mechanism. Press or slide the locking mechanism on each connector while pulling firmly straight back to disconnect. Work methodically from top to bottom. If connectors are tight, rock gently side-to-side while pulling—do not pry on connector bodies.
5. 5

   Remove Fuse Box Mounting Fasteners
   Verify the correct Torx driver size against 2009 DB9 service documentation, then remove the mounting fasteners securing the fuse box to the body bracket. Support the fuse box with one hand while removing the final fastener to prevent it from dropping. Note the orientation and position of any spacers or grommets on the mounting studs. Note: Using the appropriate Torx driver (verify size on vehicle), remove the mounting fasteners securing the fuse box to the body bracket after confirming the count against service documentation. Note: Using the appropriate Torx driver (verify correct size against OEM documentation), remove the mounting fasteners securing the fuse box to the body bracket.
6. 6

   Remove Fuse Box Assembly
   With all fasteners and connectors removed, carefully maneuver the fuse box out of the mounting location. The box must be tilted and rotated to clear surrounding structure—rotate rear of box toward center of vehicle first, then pull forward and down. Inspect the mounting bracket for damage or corrosion.
7. 7

   Transfer Fuses and Relays
   If installing a new fuse box, carefully transfer all fuses and relays from the old box to corresponding positions in the new box. Use the fuse diagram on the fuse box cover or in the owner's manual to verify correct positions. Check each fuse for integrity—replace any blown or corroded fuses with proper amperage rating.
8. 8

   Install Fuse Box Assembly
   Position the new or serviced fuse box near the mounting location. Orient the box with connectors facing rearward. Maneuver into position by inserting front edge first, then rotating rear of box into place. Align mounting holes with studs or threaded inserts on bracket. Ensure any grommets or spacers are in place.
9. 9

   Install Mounting Fasteners
   Install the Torx mounting fasteners (verify exact count against 2009 DB9 service documentation) hand-tight initially. Once all fasteners are started, tighten evenly in the sequence specified by 2009 DB9 service documentation to the manufacturer-specified torque (do not rely on generic estimates; confirm the exact value before final tightening). Ensure fuse box sits flush against mounting bracket with no gaps or movement. Note: Once all fasteners are started, tighten them evenly to the specified torque; verify fastener layout and any sequence against service documentation. Note: Once all fasteners are started, tighten them in a crossing pattern to the OEM torque specification (verify the correct value and pattern against 2009 DB9 documentation).
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
10. 10

    Reconnect Electrical Connectors
    Reconnect each multi-pin connector to the rear of the fuse box. Align connector keys properly and push firmly until you hear or feel the locking mechanism engage. Verify each connector is fully seated by gently pulling back—connector should not move if properly locked. Check that no pins are bent or misaligned.
11. 11

    Reinstall Lower Trim Panel
    Position the lower trim panel back into place. Align all trim clips with their corresponding holes in the body structure. Starting at one edge, press firmly on each clip location until you hear or feel it snap into place. Work around the perimeter until all clips are seated. Verify panel is flush and secure.
12. 12

    Reconnect Battery
    Return to the boot (trunk) and reconnect the negative battery cable to the negative terminal. Install terminal bolt and tighten to specification. Ensure cable has good contact with terminal post and connection is secure.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Reinstallation follows removal in reverse order
2. Ensure all trim clips are properly seated and panels are flush before applying pressure
3. Verify all electrical connectors are fully locked before reconnecting battery
4. Transfer fuses and relays to exact same positions in replacement fuse box

Verification

• Turn ignition to ON position (do not start engine) and verify instrument cluster illuminates normally with no unusual warning lights
• Test interior lights, power windows, power door locks, and climate control fan operation
• Start engine and verify normal operation—no new fault codes or warning lights related to electrical system
• Use multimeter to check for proper voltage at fuse box output terminals (12V on ignition-switched circuits with key ON)
• Test operation of accessories on different circuits (radio, wipers, power seats) to confirm all fuse box circuits are functional
• Re-enter radio security code and set clock if applicable

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