my Toyota Corolla E210 (2019-2024) dashboard lights are flickering, what should I do?

Solution

1. Preparation

• Gather tools and materials.
• Disconnect the negative battery terminal to prevent electrical shorts during inspection.

2. Battery and Connections Check

• Sub-steps:
  • Remove any corrosion from battery terminals using a wire brush.
  • Tighten the battery terminals to ensure a secure connection.
  • Reconnect the negative battery terminal and test the dashboard lights again.

3. Alternator Inspection

• Sub-steps:
  • Locate the alternator in the engine bay.
  • Use a multimeter to measure the voltage output of the alternator while the engine is running. Ensure it reads between 13.7 to 14.7 volts.
  • If the voltage is below this range, the alternator may need to be replaced.

4. Wiring and Connector Inspection

• Sub-steps:
  • Visually inspect the wiring harness connected to the dashboard for any signs of wear or fraying.
  • Check all connectors to ensure they are securely attached and free from corrosion.
  • Repair or replace any damaged wiring or connectors as necessary.

5. Fuse Inspection

• Sub-steps:
  • Locate the fuse box and identify the fuses related to the dashboard lighting circuit.
  • Remove and visually inspect each fuse; replace any blown fuses with new ones of the same amperage.

Tools Required:

• Multimeter
• Wire brush
• Socket set
• Fuse puller

Parts Required:

• Replacement fuses (if necessary)
• Battery terminal cleaner (if corrosion is present)

Estimated Repair Time: 1-2 hours

Safety Warnings:

• Always disconnect the battery before working on electrical components to prevent short circuits.
• Allow the engine to cool down before opening the hood for inspection.