why does my Honda Civic 11th Generation (2022-Present) battery die overnight when car is off

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked in a safe, well-ventilated area.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Address Battery Connections

• Sub-step 1: Clean battery terminals using a wire brush or battery terminal cleaner.
• Sub-step 2: Tighten the battery cable connections to ensure a secure fit.
• Tools Required: Wire brush, socket set.

3. Resolve Parasitic Draw

• Sub-step 1: Reconnect the negative battery terminal.
• Sub-step 2: Set the multimeter to measure current and disconnect the negative cable again.
• Sub-step 3: Connect the multimeter in series with the negative cable and battery terminal.
• Sub-step 4: Identify the circuit causing excessive draw by removing fuses one at a time and observing the multimeter reading.
• Tools Required: Multimeter, fuse puller.

4. Repair or Replace Faulty Components

• Sub-step 1: Once the problematic circuit is identified, determine if a specific component is faulty.
• Sub-step 2: Replace or repair the identified component or wiring as necessary.
• Parts Required: Replacement components as needed (e.g., switch, relay, light bulb).