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Automotive glossary

Hazard Warning Lights

Hazard warning lights flash all turn signals at the same time to warn other road users of danger.

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What is Hazard Warning Lights?

They are used when broken down or stopped in a dangerous place. They work even with the ignition switched off. Many cars switch them on automatically after a crash or emergency stop. Some countries allow a short burst of hazard lights to warn following traffic of a queue ahead.

How it works

The hazard switch commands the flasher unit or lighting module to flash all indicators together.

Why it matters for your car

Do not use them as an excuse to park illegally. When broken down, also use the warning triangle and a high-visibility vest where required.

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