my Tesla Outback won’t start after heavy rain, what could be wrong?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety while working on the electrical system.

2. Battery Inspection and Cleaning

• Tools Required: Wrench set, wire brush, battery terminal cleaner.
• Remove the battery terminals, starting with the negative terminal.
• Clean the terminals and battery posts using a wire brush and battery terminal cleaner.
• Reconnect the battery terminals securely, ensuring a tight fit.

3. Addressing Water Intrusion

• Tools Required: Towels, shop vacuum, waterproofing spray (if needed).
• Dry any visible water pooling in the engine compartment using towels or a shop vacuum.
• Inspect seals and gaskets around the hood and electrical components; replace any damaged seals as necessary.

4. Electrical System Checks

• Tools Required: Multimeter, fuse puller.
• Use the multimeter to test the battery voltage again; if below 12.4 volts, consider charging or replacing the battery.
• Check all relevant fuses by pulling them out with a fuse puller and inspecting for continuity with a multimeter.

5. Reassembly and Final Checks

• Reconnect the battery, ensuring all connections are secure.
• Start the vehicle to check if the issue has been resolved.