For a diagram of the inclusion of direction indicators and alarms, see subsection 12.9.
Relay-breaker 6 is designed to receive an intermittent light signal of the direction indicators both in the alarm mode and in the direction indication mode, as well as to monitor the serviceability of the direction indicator lamps. If the bulbs are good, then in the turn signal mode it creates a flashing indicator lamp 7. If the bulbs are bad (burnout or open circuit in the lamp circuit), then the relay-breaker provides twice the flashing frequency of the control lamp.
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 +500°C and a voltage of 10.8 to 15 V.
Until 1985, a relay-breaker of type 23.3747, assembled on integrated circuits, was used. Since 1985, a relay-breaker 231.3747 has been installed, made of discrete elements.
The characteristics of both relay-breakers are the same. External difference is the absence of a plug "5" at the relay-breaker 231.3747. The supply voltage is only applied to the plug "1". Therefore, no brown wire is needed connecting the plug "5" relay-breaker with plug "6" switch 9 alarm. Relay-breaker 23.3747 provides constant burning of the control lamp 7 in case of burnout of any of the direction indicator lamps or an open in its power circuit.