my Tesla Model S won't start 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

527 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 symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Follow high-voltage safety protocols when inspecting main battery connections.

Symptoms

•Vehicle makes a clicking sound when attempting to start
•Interior lights dim or flicker when starting
•No engine cranking or movement
•Dashboard warning lights may illuminate
•Possible loss of auxiliary power features (e.g., radio, lights)

Diagnostic Steps

1
Check the state of charge of the 12V battery using the vehicle’s display.
2
Inspect the 12V battery connections for corrosion or looseness.
3
Use a multimeter to measure the voltage of the 12V battery; it should be above 12.4 volts.
4
If available, connect a jump starter or another vehicle to see if the car starts.
5
If the vehicle starts with a jump, test the 12V battery under load to check its health.
6
Inspect the main battery connections for any signs of damage or corrosion.

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
•Wire brush
•Cleaning solution (baking soda and water)

Parts Required

•12V battery (if replacement is necessary)

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Diagnostic Steps

1
Check the state of charge of the 12V battery using the vehicle’s display.
2
Inspect the 12V battery connections for corrosion or looseness.
3
Use a multimeter to measure the voltage of the 12V battery; it should be above 12.4 volts.
4
If available, connect a jump starter or another vehicle to see if the car starts.
5
If the vehicle starts with a jump, test the 12V battery under load to check its health.
6
Inspect the main battery connections for any signs of damage or corrosion.

Solution

1. Preparation

Gather tools: multimeter, socket set, and cleaning supplies.
Ensure the vehicle is in a safe location and connected to a charger if needed.
Wear safety gloves and goggles for protection.

2. Inspect and Clean Battery Connections

Sub-step 1: Disconnect the negative terminal of the 12V battery to prevent any short circuits.
Sub-step 2: Remove the positive terminal and inspect for corrosion. Clean terminals and cable ends with a wire brush and a solution of baking soda and water.
Sub-step 3: Reconnect the terminals securely, ensuring no corrosion is present.

3. Test and Replace 12V Battery (if necessary)

Sub-step 1: Use the multimeter to measure the voltage after reconnecting the terminals; it should be above 12.4 volts.
Sub-step 2: If the voltage is low, remove the 12V battery from its compartment.
Sub-step 3: Replace with a new compatible 12V battery, ensuring it is correctly positioned and secured.
Sub-step 4: Reconnect the battery terminals, starting with the positive terminal followed by the negative terminal.

4. Main Battery Inspection

Sub-step 1: If the vehicle still does not start, visually inspect the main battery connections.
Sub-step 2: Ensure all high-voltage safety protocols are followed; do not attempt repairs without proper training.
Sub-step 3: If any issues are found, consult a Tesla service technician for further diagnosis.