VEHICLE LED LAMP LIGHTING CIRCUIT, VEHICLE LED LAMP LIGHTING DEVICE, AND METHOD FOR CONTROLLING VEHICLE LED LAMP LIGHTING CIRCUIT

摘要

This vehicle LED lamp lighting circuit controls lighting of an LED lamp mounted on a vehicle, and is provided with: a first resistor which has one end connected to a power supply line for feeding power supply voltage and has the other end connected to a first contact; a first LED lamp which is formed of at least one first LED element, and which has one end connected to a reference node and has the other end connected to a second contact and a grounded ground wire; and a switching device exposed to water which switches between a first state where the reference node and the first contact have electrical continuity and a second state where the reference node and the second contact have electrical continuity.