why is my Tesla Model 3 Highland (2024-present) dashboard showing a red battery light

Solution

1. Preparation

• Ensure the vehicle is in a safe location and powered off.
• Gather necessary tools and parts.

2. Check Battery Connections

1. Safety First: Disconnect the 12V battery before proceeding to avoid electrical hazards.
2. Locate the battery compartment (typically in the trunk or under the front hood).
3. Inspect all connections for signs of corrosion or loose terminals.
4. Tighten any loose connections and clean terminals if necessary.

3. Battery Health Assessment

1. Reconnect the 12V battery and power on the vehicle.
2. Access the battery management system through the touchscreen.
3. Review the battery health metrics to determine if the battery is functioning within normal parameters.
4. If the battery shows significant degradation, prepare for battery replacement.

4. Replace Battery (if necessary)

1. Tools Required: Socket set, torque wrench, insulated gloves.
2. Follow manufacturer guidelines for battery removal:
   • Disconnect all associated cables carefully.
   • Remove the old battery using appropriate tools.
   • Install the new battery, ensuring all connections are secure.
3. Use the torque wrench to tighten connections to specified values (refer to service manual for exact torque specifications).

5. Final Checks

1. Reconnect the 12V battery and power the vehicle on.
2. Monitor the dashboard for the battery warning light and any other alerts.
3. Perform a test drive to ensure the vehicle operates normally.