why does my Ford F-150 Fourteenth Generation (2021-present) battery die when parked

Solution

1. Preparation

• Tools Required: Multimeter, basic hand tools (socket set, wrenches), wire brush, and protective gloves.
• Ensure the vehicle is parked on a flat surface and the ignition is off. Disconnect the negative battery cable first.

2. Clean Battery Terminals

• Sub-steps:
  1. Using a wire brush, clean the battery terminals and cable ends to remove any corrosion.
  2. Reconnect the terminals securely.

3. Replace Battery if Necessary

• If the battery is found to be weak or faulty (reading below 12.4 volts after testing), replace it.
• Sub-steps:
  1. Remove the old battery by loosening the terminal bolts and removing the battery hold-down bracket.
  2. Install the new battery in the reverse order of removal, ensuring terminals are tightened properly.

4. Repair or Replace Faulty Components

• If a specific component has been identified as the source of the parasitic drain, proceed with repair or replacement.
• Sub-steps:
  1. Remove the component (e.g., relay, module) by disconnecting the wiring harness and unscrewing any retaining fasteners.
  2. Install the new part and reconnect all necessary wiring.

5. Reassemble and Test

• Reconnect the negative battery cable and ensure all systems are functioning.
• Sub-steps:
  1. Start the vehicle and check for any warning lights or issues.
  2. Allow the vehicle to run for a few minutes to ensure the electrical system is stable.