In a business or residential area you must give a continuous turn signal for at least 100 feet before turning. In other areas the signal must be given at least 200 feet before turning. This may not be the exact law in your state but is pretty much universal in every state so it will be close.
100
100ft
You must signal at least six feet from the turn
When traveling under 45 mph, you must signal at least 100 feet before making a turn. This signal allows other drivers and pedestrians to anticipate your actions and helps maintain safety on the road.
California law requires drivers to signal their intention to turn by electronic means or through the use of arm signals. The signal must be made in a manner in which other drivers to the rear or in front of the vehicle (within a distance of 300 feet) can clearly see the driver's intention. Turn lamps indicating the driver's intention to turn must be use continuously for at least 100 feet before executing the turn.
Traffic Codes Regarding Use of Turn Signals That depends on the traffic code for the state or jurisdiction in which the vehicle is being driven. For example, if I correctly recall, in Texas the turn signal must be used for at least ninety [90] feet prior to the beginning of the turn.
You should turn on your turn signal before you need to brake for the turn.
As soon as you have changed lanes, you turn off your turn signal.
turn your turn signal on
You should activate your turn signal at least 100 feet before making a turn or changing lanes, allowing other drivers adequate time to react. In residential areas, signaling for about 3-5 seconds before the maneuver is generally recommended. Always ensure you maintain the signal until you complete the turn or lane change. Local laws may vary, so it's good to familiarize yourself with specific regulations in your area.
When the traffic signal shows "straight on right turn only" at an intersection, you must only make a right turn and cannot go straight. Follow the direction of the signal and yield to pedestrians and oncoming traffic before turning.
must replace whole turn signal switch.