my Tesla Model S Original (2012-2020) won't start just clicks what to do

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

532 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 a Tesla Model S that won't start and only clicks. 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

•Disconnect the vehicle from any charging source before working on the battery.
•Wear safety gloves when handling batteries to prevent acid contact.

Symptoms

•Clicking noise heard when attempting to start the vehicle
•Dashboard lights illuminate momentarily
•No engine turnover or cranking sound
•Possible 'Battery Not Detected' message on the screen
•Reduced range displayed on the battery meter
•Inoperative features such as lights or infotainment system

Diagnostic Steps

1
Verify the state of charge of the 12V battery using the Tesla app or by inspecting the battery voltage.
2
Inspect the 12V battery terminals for corrosion or loose connections.
3
Check for any error codes using the Tesla diagnostic tools (if available).
4
Monitor the main battery pack voltage through the vehicle's diagnostics.
5
Attempt to jump-start the vehicle using a portable jump starter or another vehicle.
6
Inspect for any blown fuses related to the starting system.

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
•Battery terminal cleaner
•Socket set
•Safety gloves

Parts Required

•Replacement 12V battery (specific to Tesla Model S)

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Symptoms

•Clicking noise heard when attempting to start the vehicle

•Dashboard lights illuminate momentarily

•No engine turnover or cranking sound

•Possible 'Battery Not Detected' message on the screen

•Reduced range displayed on the battery meter

•Inoperative features such as lights or infotainment system

Diagnostic Steps

1
Verify the state of charge of the 12V battery using the Tesla app or by inspecting the battery voltage.
2
Inspect the 12V battery terminals for corrosion or loose connections.
3
Check for any error codes using the Tesla diagnostic tools (if available).
4
Monitor the main battery pack voltage through the vehicle's diagnostics.
5
Attempt to jump-start the vehicle using a portable jump starter or another vehicle.
6
Inspect for any blown fuses related to the starting system.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is in a safe location and parked on a level surface.
Disconnect the vehicle from any charging source.

2. Inspect and Replace the 12V Battery

Access the 12V Battery Compartment
- Open the front trunk to access the 12V battery.
- Remove any covers or panels that obstruct access.
Check Battery Connections
- Inspect the positive and negative terminals for corrosion.
- Clean any corrosion with a battery terminal cleaner or a mixture of baking soda and water.
- Tighten any loose connections.
Test the 12V Battery
- Use a multimeter to check the voltage (should be around 12.6V for a fully charged battery).
- If the voltage is significantly lower, proceed to replacement.
Replace the 12V Battery
- Disconnect the negative terminal first, followed by the positive terminal.
- Remove the old battery from the compartment.
- Install the new 12V battery in reverse order: connect the positive terminal first, then the negative.
- Secure any battery covers or panels.

3. Verify Main Battery Health

Check Battery Health Using Tesla Diagnostics
- If the vehicle still does not start, check the main battery pack's state of charge.
- If the battery is depleted, attempt to charge the vehicle.
Professional Assistance
- If the vehicle does not respond after battery replacement, contact Tesla service for further diagnostics.