why does my Toyota Highlander XU70 (2020-Present) dashboard lights flicker?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery to prevent electrical shocks.

2. Clean Battery Terminals

• Sub-steps:
  1. Remove the negative terminal first, followed by the positive terminal.
  2. Clean the terminals with a wire brush and a mixture of baking soda and water to remove corrosion.
  3. Rinse with water and dry completely.
  4. Reconnect the positive terminal first, followed by the negative terminal.
• Tools Required: Wire brush, baking soda, water.

3. Replace Blown Fuses

• Sub-steps:
  1. Locate the fuse box (usually under the dashboard or in the engine compartment).
  2. Remove the cover and identify any blown fuses using the schematic on the cover.
  3. Replace any blown fuses with the same rating.
• Tools Required: Fuse puller or pliers.

4. Test and Replace Battery

• Sub-steps:
  1. If the voltage test indicated a weak battery, remove the battery from the vehicle.
  2. Replace it with a new battery that meets the manufacturer's specifications.
  3. Reconnect the battery and ensure all connections are secure.
• Tools Required: Socket set, battery terminal cleaner, new battery.
• Safety Warnings: Ensure to wear gloves and safety goggles while handling batteries.

5. Alternator Inspection and Replacement

• Sub-steps:
  1. If the alternator output is below the specified range, remove the alternator.
  2. Inspect the alternator for any physical damage or wear.
  3. Replace the alternator with a new one if necessary.
  4. Reinstall and connect all wiring and belts securely.
• Tools Required: Socket set, torque wrench, multimeter.
• Safety Warnings: Disconnect the battery before working on the alternator.