Why you should turn on your car’s headlights 10 seconds before starting the car

Turning on your headlights briefly before starting the engine can help prepare your car’s battery for the upcoming load. This small action gives the battery a moment to adjust before powering the starter motor.

When a car sits unused for hours or days—especially in cold conditions—the battery’s voltage naturally decreases. This makes the initial engine start more demanding.

By switching on the headlights first, you introduce a light, steady electrical load. This helps stabilize the battery’s voltage and improves its readiness.

As a result, the strain caused by the sudden, high current draw of the starter motor is reduced. The process becomes smoother and less stressful for the battery.

This simple habit can contribute to a longer battery lifespan. It may also make starting your car easier during colder months.

Additionally, it helps protect sensitive electronic components by minimizing sudden voltage fluctuations when the engine starts.

To do this, turn on the headlights, wait about 10 seconds, then start the engine. Avoid using other electrical systems until the engine is running for best results.