why does my Tesla Model S Original (2012-2020) not turn on when it rains

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-3 hours

Time

medium

Difficulty

high

Severity

3 min read

491 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 the electrical issue causing your Tesla Model S (2012-2020) not to start during rainy weather. Step-by-step guide included.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the 12V battery before working on electrical components to avoid shock.

Symptoms

•Vehicle does not power on or respond to key fob
•Dashboard lights and indicators remain off
•Clicking sound when attempting to start the vehicle
•Error messages on the touchscreen, if applicable
•Water accumulation in certain areas of the vehicle (e.g., under the frunk or in the battery compartment)

Diagnostic Steps

1
Inspect for water ingress in the battery compartment and electronic control units.
2
Check the key fob battery and ensure it is functioning properly.
3
Use an OBD-II scanner to check for any error codes related to electrical systems or communication issues.
4
Examine the fuse box for any blown fuses that could affect the starting system.
5
Inspect wiring harnesses and connectors for corrosion or damage caused by moisture.
6
Verify the condition of the high-voltage battery and its connections to ensure proper contact.

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
•OBD-II scanner
•Socket set
•Flashlight

Parts Required

•Key fob battery (CR2032)
•Replacement fuses (as needed)

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Symptoms

•Vehicle does not power on or respond to key fob

•Dashboard lights and indicators remain off

•Clicking sound when attempting to start the vehicle

•Error messages on the touchscreen, if applicable

•Water accumulation in certain areas of the vehicle (e.g., under the frunk or in the battery compartment)

Diagnostic Steps

1
Inspect for water ingress in the battery compartment and electronic control units.
2
Check the key fob battery and ensure it is functioning properly.
3
Use an OBD-II scanner to check for any error codes related to electrical systems or communication issues.
4
Examine the fuse box for any blown fuses that could affect the starting system.
5
Inspect wiring harnesses and connectors for corrosion or damage caused by moisture.
6
Verify the condition of the high-voltage battery and its connections to ensure proper contact.

Solution

1. Preparation

Tools Required: Multimeter, OBD-II scanner, socket set, flashlight.
Ensure the vehicle is parked in a dry area.
Disconnect the 12V battery to prevent electrical shock.

2. Inspect and Dry Components

Sub-steps:
1. Open the frunk and inspect for water accumulation.
2. Remove any covers or panels to access battery and electronic components.
3. Use a microfiber cloth or blower to dry any wet areas.
4. Check and dry the connectors and wiring harnesses that may show signs of corrosion.
5. Ensure that drainage channels are clear and functioning properly.

3. Replace Components (if necessary)

Sub-steps:
1. If any fuses are blown, replace them with the correct amperage fuses.
2. If the key fob battery is dead, replace it with a new battery (typically CR2032).
3. For any corroded connectors, clean them with electrical contact cleaner and apply dielectric grease.

4. Reconnect and Test

Sub-steps:
1. Reconnect the 12V battery and ensure all connections are secure.
2. Attempt to power on the vehicle using the key fob.
3. Use the OBD-II scanner to clear any error codes and check for new codes after attempting to start.