my Toyota RAV4’s battery dies overnight what’s causing it

Solution

1. Preparation

• Gather tools: multimeter, socket set, screwdriver set, battery terminal cleaner, and battery tester.
• Ensure the vehicle is parked in a safe area and the engine is turned off.

2. Address Battery Corrosion

• Disconnect the negative terminal first using a socket wrench.
• Clean the battery terminals and cable connectors with a battery terminal cleaner or a mixture of baking soda and water.
• Rinse with water and dry completely before reconnecting.

3. Replace Battery (if necessary)

• If the battery test indicates it is faulty, remove the battery using a socket wrench.
• Install the new battery by placing it in the battery tray and securing it with the bracket.
• Connect the positive terminal first, followed by the negative terminal. Ensure they are tight.

4. Repair or Replace Faulty Components

• If parasitic draw is detected from a specific component, repair or replace that component (e.g., trunk light switch, glove box light).
• For any aftermarket accessories, ensure they are properly wired to avoid additional draw.

5. Testing the Repair

• Reconnect the battery and start the vehicle to ensure it starts without issue.
• Monitor the vehicle for a few days to ensure the battery does not discharge overnight.