What do you do when the mechanical turn signal isn't working to turn?

When the mechanical turn signal is not functioning, using appropriate hand signals is the correct course of action. Hand signals provide a clear indication of your intention to other drivers and pedestrians, ensuring that they are aware of your upcoming turn or lane change. This is particularly important for safety, as visual communication helps prevent accidents and misunderstandings on the road.

Utilizing hand signals is a fundamental aspect of defensive driving, and it demonstrates adherence to traffic laws, which often require drivers to signal their intentions regardless of the operational status of their vehicle's equipment. By using hand signals—such as extending your left arm straight out to signal a left turn or bending it upwards for a right turn—you maintain effective communication with other road users, enhancing overall safety.

The other options would not provide the necessary communication to others on the road. Making no signals can lead to confusion and potential accidents, while turning on hazard lights or using the emergency brake does not convey your intent to turn. Therefore, using hand signals is the best practice when your vehicle's mechanical signal fails.