Problem Statement
Learn how to diagnose and fix the issue of the brake light staying on in Tesla Model 3 (2017-2023). Step-by-step guide with diagnostic procedures and repair instructions.
my Tesla Model 3 Original (2017-2023) brake light stays on when the car is off
Tesla Model 3 Highland (2024-present)
1-2 hours
Time
medium
Difficulty
medium
Severity
3 min read
586 words
Affected Component
Electrical
Estimated Time
1-2 hours
⚠️ Safety Warnings
Important safety information - read before proceeding
- •Disconnect the battery before working on electrical systems to avoid shock or short circuits.
Symptoms
- •Brake light stays on when the vehicle is turned off
- •Battery drain due to continuous brake light activation
- •Possible warnings on the dashboard related to braking system
- •Reduced battery efficiency
- •Potential overheating of brake light assembly
Diagnostic Steps
- 1
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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
- •Socket set
- •Multimeter
- •OBD-II scanner
- •Screwdriver set
Parts Required
- •Brake pedal switch (if replacement is necessary)
- •Wiring harness (if damaged)
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