my Tesla Model S won't start and just clicks, how to fix it

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

505 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 starting issues in Tesla Model S. Step-by-step guide with diagnostic procedures and repair instructions for electrical problems.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the main battery before working on electrical systems.
•Allow the vehicle to sit for at least 10 minutes after disconnecting the main battery to avoid electrical shock.

Symptoms

•Vehicle does not start; only a clicking noise is heard
•Dashboard lights may illuminate briefly
•Possible dimming of interior lights when the start button is pressed
•No power to accessories (e.g., radio, climate control)
•Battery charge level might be low or at zero
•Error messages displayed on the screen (if applicable)

Diagnostic Steps

1
Check the battery status using the Tesla app or vehicle display.
2
Inspect the 12V battery connections for corrosion or loose terminals.
3
Verify the condition of the 12V battery using a multimeter (should read around 12.6V for a healthy battery).
4
Check for any error codes using a Tesla diagnostic tool.
5
Ensure that the vehicle is in 'Park' mode (if applicable) when attempting to start.
6
Inspect the main battery pack for any visible issues or signs of damage.

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

•Basic hand tools
•Multimeter
•Tesla diagnostic tool (if available)
•Socket set

Parts Required

•New 12V battery

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Symptoms

•Vehicle does not start; only a clicking noise is heard

•Dashboard lights may illuminate briefly

•Possible dimming of interior lights when the start button is pressed

•No power to accessories (e.g., radio, climate control)

•Battery charge level might be low or at zero

•Error messages displayed on the screen (if applicable)

Diagnostic Steps

1
Check the battery status using the Tesla app or vehicle display.
2
Inspect the 12V battery connections for corrosion or loose terminals.
3
Verify the condition of the 12V battery using a multimeter (should read around 12.6V for a healthy battery).
4
Check for any error codes using a Tesla diagnostic tool.
5
Ensure that the vehicle is in 'Park' mode (if applicable) when attempting to start.
6
Inspect the main battery pack for any visible issues or signs of damage.

Solution

1. Preparation

Tools Required: Basic hand tools, multimeter, Tesla diagnostic tool (if available).
Safety Warnings: Disconnect the main battery before working on electrical systems.

2. Inspect and Replace 12V Battery

Locate the 12V battery: It is usually found in the front trunk (frunk) area.
Disconnect the battery:
- Use a socket set to remove the negative terminal first, followed by the positive terminal.
Remove the old battery:
- Unscrew any mounting brackets and carefully lift the old battery out.
Install the new 12V battery:
- Place the new battery in the bracket and secure it with the mounting hardware.
- Connect the positive terminal first, followed by the negative terminal.
Check connections: Ensure all connections are tight and free of corrosion.

3. Test the Vehicle

Reconnect the main battery: If it was disconnected, ensure it is properly reconnected.
Attempt to start the vehicle: Press the start button and listen for any changes.
Monitor the display: Check for any messages indicating issues with the battery or electrical system.