why does my Honda Accord 10th Generation (2018-2022) battery die overnight when the car is off

Solution

1. Preparation

• Tools Required: Multimeter, ammeter, socket set, wrench set, wire brush (for cleaning terminals), safety glasses, gloves.
• Disconnect the negative battery terminal using a wrench. Allow the system to reset.

2. Battery Replacement (if necessary)

• Sub-steps:
  1. Remove the battery hold-down bracket using the socket set.
  2. Lift out the old battery carefully.
  3. Clean the battery tray and terminals with a wire brush.
  4. Place the new battery in the tray, ensuring it’s secured properly.
  5. Reconnect the positive terminal first, followed by the negative terminal.

3. Repair Electrical Draw (if identified)

• Sub-steps:
  1. Replace or repair the faulty component based on the circuit identified during the parasitic draw test.
  2. Reinstall fuses if removed and ensure connections are tight.
  3. Test the electrical system and recheck for current draw.

4. Final Check

• Sub-steps:
  1. Reconnect the battery terminal securely.
  2. Start the vehicle and monitor electrical accessories for proper function.
  3. Conduct a final multimeter test to ensure no current draw is present when the vehicle is off.