This procedure covers the removal and replacement of the audio amplifier in a 2015-2020 Ford F-150, which is typically located behind the rear seat in the crew cab configuration.

Warnings

Tools required

Parts

• Audio amplifier × 1 — Use OEM specification or verify aftermarket compatibility with Sony premium audio system
• Wiring harness retaining clips (if damaged) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn ignition off and remove key
3. Disconnect negative battery terminal to prevent electrical shorts
4. Allow audio system to sit for 5 minutes after battery disconnect to discharge capacitors
5. Verify you have the correct replacement amplifier for your audio system configuration (base vs. Sony premium)

Procedure

1. 1

   Remove rear seat bottom cushion
   For crew cab models, locate the two seat release handles at the front corners of the rear seat bottom cushion. Pull up firmly on these handles and lift the front edge of the seat cushion up and forward to disengage the rear hooks. Remove the seat cushion from the vehicle.
2. 2

   Remove rear seat back lower trim panel
   Locate the lower trim panel on the rear seat back. Use trim panel removal tools to carefully pry out the retaining clips starting from the bottom edges. Work your way around the perimeter, being careful not to break the plastic clips. Set the panel and clips aside for reinstallation.
3. 3

   Locate amplifier module
   The amplifier is mounted on the backside of the rear seat back, typically on the driver side. It is a rectangular metal box approximately 8x10 inches with multiple wiring connectors. Use a flashlight to identify all mounting bolts and electrical connectors.
4. 4

   Disconnect electrical connectors
   Identify all electrical connectors attached to the amplifier (typically 3-5 connectors depending on audio system configuration). Press the release tabs on each connector and carefully pull straight out. Do not pull on the wires themselves. Note the position of each connector or take reference photos.
5. 5

   Remove amplifier ground connection
   Locate the ground wire bolted to the amplifier chassis or mounting bracket. Use an 8mm socket to remove the ground bolt. Inspect the ground connection point for corrosion and clean with electrical contact cleaner if necessary.
   Torque spec

   Ground Bolt17 Nm (13 lb-ft)
6. 6

   Remove amplifier mounting bolts
   Use a 10mm socket to remove the amplifier mounting bolts (typically 3-4 bolts). Support the amplifier with one hand while removing the final bolt to prevent it from falling. Carefully remove the amplifier from its mounting location.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
7. 7

   Inspect mounting bracket and connectors
   Examine the mounting bracket for damage or corrosion. Check all electrical connectors for bent pins, corrosion, or damage. Clean connector pins with electrical contact cleaner if needed. Verify the replacement amplifier matches the original unit's connector configuration.
8. 8

   Install replacement amplifier
   Position the new amplifier in the mounting location, aligning the mounting holes with the bracket. Install the mounting bolts hand-tight first to ensure proper alignment, then torque to specification using a torque wrench in a cross-pattern sequence.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
9. 9

   Reconnect ground connection
   Ensure the ground contact surface on both the amplifier and mounting point is clean and free of paint or corrosion. Install the ground wire and torque the ground bolt to specification.
   Torque spec

   Ground Bolt17 Nm (13 lb-ft)
10. 10

    Reconnect electrical connectors
    Reconnect all electrical connectors to the amplifier in their original positions, referring to your reference photos if needed. Each connector should click firmly into place. Gently tug on each connector to verify it is fully seated and locked.
11. 11

    Reinstall rear seat trim and cushion
    Reinstall the rear seat back lower trim panel, pressing firmly around the perimeter to engage all retaining clips. Replace any broken clips. Reinstall the rear seat bottom cushion by inserting the rear hooks first, then pressing down firmly at the front until the seat latches engage.
12. 12

    Reconnect battery and initialize system
    Reconnect the negative battery terminal and torque to specification. Do not overtighten as this can damage the battery terminal. Turn the ignition to the ON position without starting the engine to allow the audio system to initialize.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Ensure all electrical connectors are fully seated and locked before closing up interior panels
2. Verify rear seat cushion is properly latched on both sides before use
3. Double-check that no tools or parts were left behind the rear seat

Verification

• Turn the vehicle on and test the audio system across all speakers to verify proper amplifier operation
• Test all speaker zones (front, rear, subwoofer if equipped) at various volume levels
• Verify no distortion, crackling, or cutting out occurs during audio playback
• Check for any dashboard warning lights or audio system error messages
• Test steering wheel audio controls and head unit controls for proper response
• Verify rear seat is securely latched and does not rattle during test drive

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