my Tesla Model S Plaid/Refresh (2021-present) won't start just clicks is my battery dead

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

541 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix the no-start issue in Tesla Model S Plaid. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always disconnect the negative battery terminal before working on the electrical system.
•Avoid working on the battery terminals when the vehicle is powered on.

Symptoms

•No engine start, only clicking sound heard
•Dashboard lights dim or flickering
•Power windows and accessories unresponsive
•"Battery Low" warning displayed on the screen
•Possible error messages related to the electrical system

Diagnostic Steps

1
Check the key fob battery to ensure it is functioning properly.
2
Attempt to start the vehicle while pressing the brake pedal to confirm the clicking sound.
3
Inspect the vehicle's battery state of charge using the Tesla app or dashboard display.
4
Connect a multimeter to the battery terminals to measure voltage (should be above 12.4 volts for a healthy battery).
5
Check for any loose or corroded connections at the battery terminals.
6
Verify if the 12V battery is functioning, as a failure here can cause starting issues.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Multimeter
•Socket set
•Battery terminal cleaner
•Safety gloves

Parts Required

•12V battery

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Diagnostic Steps

1
Check the key fob battery to ensure it is functioning properly.
2
Attempt to start the vehicle while pressing the brake pedal to confirm the clicking sound.
3
Inspect the vehicle's battery state of charge using the Tesla app or dashboard display.
4
Connect a multimeter to the battery terminals to measure voltage (should be above 12.4 volts for a healthy battery).
5
Check for any loose or corroded connections at the battery terminals.
6
Verify if the 12V battery is functioning, as a failure here can cause starting issues.

Solution

1. Preparation

Tools Required: Multimeter, socket set, battery terminal cleaner, safety gloves.
Ensure the vehicle is in a safe location and powered off.
Wear safety gloves to protect your hands.

2. Inspect and Test the 12V Battery

Access the battery compartment: Open the frunk (front trunk) and locate the 12V battery.
Measure voltage: Use a multimeter to test the voltage at the battery terminals.
- If the voltage is below 12.4 volts, the battery may need charging or replacement.
Check connections: Inspect the positive and negative terminals for tightness and corrosion. Clean terminals if necessary using a battery terminal cleaner.

3. Charge or Replace the Battery

If the battery is low:
- Connect a smart battery charger to the 12V battery and charge it according to the manufacturer's instructions.
- Allow charging for a minimum of 30 minutes before attempting to start the vehicle again.
If the battery is faulty:
- Remove the negative terminal first, followed by the positive terminal.
- Replace with a new 12V battery (ensure it meets the specifications for the Tesla Model S).
- Reinstall the new battery by connecting the positive terminal first, followed by the negative terminal.

4. Verify System Functionality

Once the battery is charged or replaced, check that all electrical systems are operational before attempting to start the vehicle.