FIELD: electrical equipment of vehicles. SUBSTANCE: device has sensor and relay responding to sensor signal and provided with switch inserted in lighting system circuit. Sensor functions to open contacts under effect of weight on driver seat. Inserted in circuit between sensor and relay is timer which energizes relay only upon certain operating time of sensor. Device ensures disconnection of vehicle lighting system in case driver is absent for long time. EFFECT: provision for preventing unwanted battery discharge. 3 cl, 3 dwg
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