Relay-breaker type 43.3747 is installed in the mounting block. It is used to create an intermittent light signal for direction indicators in both alarm mode and turn signal mode. In addition, it allows you to monitor the health of the direction indicator lamps. So, if one of the direction indicator lamps burns out, then the frequency of switching on and off the direction indicators doubles. The control lamp of indexes of turn at the same time also blinks with the doubled frequency.
The relay-interrupter must ensure the blinking of the direction indicator lamps at a frequency of 90±30 cycles per minute at an ambient temperature of -40 to +65°C and a voltage of 10.8 to 15 V.