how to fix my Tesla Model S Original (2012-2020) if it won't start just clicks

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

587 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 no-start condition in Tesla Model S (2012-2020) with step-by-step instructions for battery inspection and jump-starting.

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 to prevent shock or short circuits.

Symptoms

•Single click sound when attempting to start
•Dash lights illuminate but engine does not crank
•Possible 'Battery Low' warning on the display
•No response from the accelerator pedal
•Interior lights may dim during the start attempt
•Unable to engage Drive or Reverse

Diagnostic Steps

1
Check the 12V battery voltage using a multimeter to ensure it is above 12.4 volts.
2
Inspect the battery terminals for corrosion or loose connections.
3
Verify the status of the main battery pack using the Tesla mobile app or dashboard.
4
Attempt to jump-start the vehicle using a compatible jump starter or jumper cables.
5
Check for any error messages or alerts on the vehicle's display.
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
•Socket set
•Jumper cables
•Wire brush

Parts Required

•12V battery

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Diagnostic Steps

1
Check the 12V battery voltage using a multimeter to ensure it is above 12.4 volts.
2
Inspect the battery terminals for corrosion or loose connections.
3
Verify the status of the main battery pack using the Tesla mobile app or dashboard.
4
Attempt to jump-start the vehicle using a compatible jump starter or jumper cables.
5
Check for any error messages or alerts on the vehicle's display.
6
Inspect for any blown fuses related to the starting system.

Solution

1. Preparation

Gather necessary tools: multimeter, socket set, jumper cables, and protective gloves.
Ensure the vehicle is in a safe location and the parking brake is engaged.
Disconnect the 12V battery negative terminal before performing any electrical work.

2. Battery Inspection

Check Battery Voltage
- Connect the multimeter to the 12V battery terminals (positive to positive, negative to negative).
- Ensure voltage is at least 12.4 volts; if not, proceed to the next step.
Inspect Battery Connections
- Visually inspect the battery terminals for any signs of corrosion.
- Clean terminals using a wire brush and reconnect securely.

3. Jump-Start the Vehicle

Setup for Jump-Start
- Position a compatible jump starter or another vehicle close to the Tesla.
- Connect the positive cable from the jump starter to the positive terminal of the Tesla's 12V battery.
- Connect the negative cable to a solid ground point on the Tesla's chassis.
Attempt Start
- Start the jump starter or the assisting vehicle.
- Attempt to start the Tesla by pressing the brake pedal and pushing the start button.

4. Battery Replacement (if necessary)

Remove Old Battery
- Disconnect the negative terminal first, then the positive terminal.
- Remove any holding brackets and lift the battery out carefully.
Install New Battery
- Place the new 12V battery in the battery tray.
- Connect the positive terminal first, followed by the negative terminal.
- Ensure all connections are tight and secure.

5. Final Checks

Reconnect the negative terminal if it was disconnected prior to starting the process.
Clear any error codes using an OBD-II scanner (if available).