Relay-breaker 8 (rice. 7-30) type 231.3747 is designed to receive an intermittent light signal of direction indicators both in the direction indication mode and in the alarm mode, as well as to check the serviceability of the direction indicator lamps. If the lamps are in good condition, then in the turn indication mode, the relay-breaker creates a flashing of the control lamp 7. If the lamps are defective (burnout or open circuit in the lamp circuit), then the relay-breaker provides a flashing of the control lamp with a double frequency.
The relay-breaker is mounted under the instrument panel on a bolt welded to the wall of the air intake box. A defective breaker relay cannot be repaired and must be replaced with a new one.
The relay-interrupter must ensure the flashing of the direction indicator lamps at a frequency of 90±30 cycles per minute at a rated load of 92 W, an ambient temperature of -20 to + 50°C and a voltage of 10.8 to 15 V.