my Toyota Camry won't start and the dashboard lights are flickering, what should I do?

Solution

1. Preparation

• Gather tools: multimeter, socket set, wire brush, safety gloves, and safety glasses.
• Ensure the vehicle is in park or neutral on a level surface and the parking brake is engaged.

2. Battery Inspection and Replacement

1. Remove Battery Cables
   • Disconnect the negative (-) terminal first, then the positive (+) terminal to avoid a short circuit.
2. Clean Terminals
   • Use a wire brush to clean any corrosion from the battery terminals and cable connectors.
3. Test or Replace Battery
   • If the battery voltage is below 12.4 volts, recharge it. If it fails the load test, replace it with a new battery (ensure the new battery matches the specifications).
4. Reconnect Battery
   • Connect the positive (+) terminal first, then the negative (-) terminal.

3. Charging System Check

1. Start the Engine
   • If the vehicle starts, use the multimeter to check voltage at the battery with the engine running; it should read between 13.7 to 14.7 volts.
2. Inspect Alternator
   • If the voltage is low, inspect the alternator belt for tightness and wear. Replace if necessary.

4. Starter and Electrical System Check

1. Inspect Starter Connections
   • Ensure the starter motor connections are tight. Clean any corrosion found.
2. Test Starter Functionality
   • If the vehicle still doesn't start, test the starter with a jumper wire to bypass the ignition switch. If the starter does not engage, it may need replacement.