why does my Tesla Outback's battery light come on while driving

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, battery tester, socket set, torque wrench
• Disconnect the negative battery cable to prevent electrical shorts and ensure safety while working.

2. Battery Terminal Inspection

• Remove the battery terminals (positive first, then negative).
• Clean any corrosion from the terminals and battery posts using a mixture of baking soda and water.
• Reconnect the battery terminals, ensuring they are tight and secure (torque to manufacturer specifications).

3. Alternator Testing

• Reconnect the battery and start the engine.
• Use the multimeter to measure the voltage at the battery terminals with the engine running; ensure it reads between 13.5 to 14.5 volts.
• If the voltage is low, remove the alternator and test its output at an auto parts store or with a bench tester.

4. Battery Replacement (if necessary)

• If the battery test indicates it is weak or failing, remove the battery using a socket set.
• Install a new battery, ensuring the correct type and size is used (refer to owner's manual).
• Reconnect the terminals (positive first, then negative) and torque them to manufacturer specifications.

5. Final Checks

• Clear any error codes using the OBD-II scanner.
• Test drive the vehicle to ensure the battery light does not reappear.