LIGHT SOURCE LIGHTING CIRCUIT AND TURN SIGNAL LAMP

摘要

The purpose of the present invention is to appropriately perform disconnection determination for a vehicle lamp provided with a first lamp unit and a second lamp unit that each receive electric power supply from a common electric power supply line. The present invention is a light source lighting circuit provided with a first lighting circuit for receiving current from the electric power supply line and supplying drive current to a first light source and a second lighting circuit for receiving the current from the electric power supply line and supplying drive current to a second light source. When a first state signal, which represents the state of the drive current flowing to the first light source, shows an abnormality, or when a first notification signal, which represents the state of the drive current flowing to the second light source and is output from the second lighting circuit, shows an abnormality, the first lighting circuit stops operation. When a second state signal, which represents the state of the drive current flowing to the second light source, shows an abnormality, or when a second notification signal, which represents the state of the drive current flowing to the first light source and is output from the first lighting circuit, shows an abnormality, the second lighting circuit stops operation.