why does my Honda Accord 10th Generation (2018-2022) battery die overnight when parked

Solution

1. Preparation

• Gather tools and materials.
• Tools Required: Multimeter, socket set, wire brush, safety gloves.
• Safety Warnings: Disconnect the battery before working on electrical systems.

2. Clean Battery Terminals

• Using a wire brush, clean the battery terminals and cable connections to remove any corrosion.
• Tighten terminal connections to ensure a good electrical contact.

3. Replace Battery (if necessary)

• If the battery voltage is significantly low or the battery shows signs of swelling or leakage:
  • Remove the negative terminal first, followed by the positive terminal.
  • Remove any securing brackets and lift the old battery out.
  • Place the new battery in the same position, ensuring it is secured.
  • Connect the positive terminal first, followed by the negative terminal.

4. Address Parasitic Draw

• If a specific fuse was identified:
  • Repair or replace any components associated with that circuit (e.g., interior lights, audio system).
  • Ensure all door switches and trunk switches are functioning properly and not causing lights to remain on.

5. Test Charging System

• Reconnect the battery and start the engine.
• Use a multimeter to measure voltage at the battery terminals; it should read between 13.8 to 14.5 volts with the engine running.
• If the voltage is low, inspect the alternator and wiring for issues.