What to Do When Your Lights Come On But Your Engine Won't Start

Troubleshoot your vehicle's no-start issue when lights turn on. Key checks for battery, starter motor, and ignition switch.

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If your lights come on but the engine doesn't start, it could be due to a faulty starter motor, a dead battery, or an issue with the ignition switch. Check the battery voltage first; if it's below 12.6 volts, charge or replace the battery. Next, inspect the starter motor for any faults. Lastly, examine the ignition switch and associated wiring. If these checks don't resolve the issue, consult a mechanic for a detailed diagnosis.

FAQs & Answers

  1. What causes the lights to come on but the car not to start? The common causes include a faulty starter motor, a dead battery, or problems with the ignition switch.
  2. How can I check if my car battery is dead? You can check the battery voltage with a multimeter; if it’s below 12.6 volts, the battery may need to be charged or replaced.
  3. What should I do if my starter motor is faulty? If you suspect a faulty starter motor, inspect it for faults, and if necessary, consult a mechanic for repairs or replacement.
  4. Why is my ignition switch causing issues? Issues with the ignition switch can arise from wear and tear or faulty wiring, and it should be examined if other components are functioning correctly.