my Tesla Outback headlights keep flickering when I drive at night

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, and screwdrivers.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Headlight Bulbs

• Sub-step 1: Remove the headlight assembly by unscrewing the retaining screws.
• Sub-step 2: Disconnect the electrical connector from the back of the headlight.
• Sub-step 3: Remove the old bulb by turning it counterclockwise.
• Sub-step 4: Install a new bulb by inserting it into the socket and turning it clockwise.
• Sub-step 5: Reconnect the electrical connector and reassemble the headlight assembly.

3. Test and Replace Relay

• Sub-step 1: Locate the headlight relay in the fuse box (consult the owner’s manual for location).
• Sub-step 2: Remove the relay and test it with a multimeter for continuity.
• Sub-step 3: If the relay is faulty, replace it with a new one of the same specifications.

4. Inspect and Repair Wiring

• Sub-step 1: Visually inspect the headlight wiring harness for damage or wear.
• Sub-step 2: Use a multimeter to check for voltage drop across the wiring.
• Sub-step 3: Repair or replace any damaged wiring or connectors as necessary.

5. Check Battery and Alternator

• Sub-step 1: Reconnect the negative battery terminal and start the vehicle.
• Sub-step 2: Measure the battery voltage with a multimeter; it should be between 12.6V and 12.8V with the engine off.
• Sub-step 3: Start the engine and check voltage; it should be between 13.7V and 14.7V, indicating the alternator is charging correctly.
• Sub-step 4: If voltages are outside these ranges, consider replacing the battery or alternator.