my Tesla Model S Original (2012-2020) won’t start and just clicks what should I do

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

459 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 (2012-2020). 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 12V battery before working on electrical systems.
•Wear safety glasses when handling batteries to prevent acid exposure.

Symptoms

•Single clicking sound when attempting to start
•Dashboard lights illuminate but no engine turnover
•Possible loss of power to accessories
•Reduced battery range displayed
•Warning message on the screen (e.g., 'Check Battery')

Diagnostic Steps

1
Inspect the 12V battery for charge level and connections.
2
Use a multimeter to check the voltage of the 12V battery (should be above 12.4V).
3
Verify the condition of the battery terminals for corrosion or loose connections.
4
Check for any fault codes using the Tesla service menu or diagnostic tools.
5
Inspect the main battery contactor for proper function.

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
•Wrench set
•Battery charger

Parts Required

•12V battery (if replacement is necessary)
•Battery terminal cleaning kit (optional)

Related Faults

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Diagnostic Steps

1
Inspect the 12V battery for charge level and connections.
2
Use a multimeter to check the voltage of the 12V battery (should be above 12.4V).
3
Verify the condition of the battery terminals for corrosion or loose connections.
4
Check for any fault codes using the Tesla service menu or diagnostic tools.
5
Inspect the main battery contactor for proper function.

Solution

1. Preparation

Gather necessary tools: multimeter, socket set, wrenches, and possibly a battery charger.
Ensure the vehicle is parked on a flat surface and the parking brake is engaged.

2. Inspect and Charge the 12V Battery

Sub-step 1: If the battery voltage is below 12.4V, connect a battery charger to the 12V battery.
Sub-step 2: Allow the battery to charge for at least 30 minutes.
Sub-step 3: Disconnect the charger after the charging period and attempt to start the vehicle again.

3. Clean and Tighten Battery Connections

Sub-step 1: Disconnect the negative (-) terminal first, followed by the positive (+) terminal from the 12V battery.
Sub-step 2: Clean any corrosion from the terminals using a wire brush and a mixture of baking soda and water.
Sub-step 3: Reconnect the positive (+) terminal first, followed by the negative (-) terminal, ensuring they are tight.

4. Inspect the Main Battery Contactor

Sub-step 1: Access the contactor located near the battery pack (specific access may vary).
Sub-step 2: Check the contactor for any signs of damage or failure.
Sub-step 3: Test the contactor operation if possible or consult a professional for replacement.