my Toyota Corolla E140 (2006-2013) has a dashboard that keeps flickering

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a level surface with the engine off.
• Disconnect the negative battery terminal to ensure safety during electrical repairs.

2. Inspect Battery and Connections

• Remove the battery terminals (negative first, then positive).
• Clean battery terminals and cable ends using a wire brush.
• Reconnect the battery terminals securely and check for any further flickering.

3. Check Fuses

• Locate the fuse box (usually under the dashboard or in the engine compartment).
• Use a fuse puller to remove fuses related to the dashboard and check for continuity using a multimeter.
• Replace any blown fuses with the same amperage rating.

4. Examine Wiring Harness

• Remove screws and bolts securing the dashboard if necessary for better access.
• Inspect the wiring harness connected to the dashboard for any damage or loose connections.
• Repair or replace any damaged wires and ensure connections are tight.

5. Test Alternator

• Start the engine and use a multimeter to measure voltage at the battery terminals.
• If voltage is below the specified range, consider replacing the alternator.