Depending on which turn signal is operated, either the left or right indicator lamp flashes. Both indicator lamps will flash when the hazard warning lights are switched on.
If one turn signal should fail, the indicator lamp will start flashing twice as fast.
This does not apply when towing a caravan or trailer. The indicator lamp will stop flashing if one of the turn signals on the vehicle or the caravan/trailer should fail. For further information on the turn signals.