| 摘要 |
PURPOSE: A circuit for putting off a tail-light is provided to previously prevent the discharge of a battery by automatically putting off the tail-light when an engine is stopped. CONSTITUTION: An input voltage(P+) is fed from a battery(BAT) and an alternate(ALT). A lighting switch(S1) turns on/off a tail-light at a driving and a parking. A tail-light relay(RY1) and a relay terminal(R1) supplies and isolates voltage to tail-lights(L1-L4) to be connected with the input voltage when the lighting switch is turned on. A voltage isolating relay(RY3) and a relay terminal(R3) isolates the input voltage to the tail-lights when the lighting switch is turned off. An engine managing system(EMS) has an internal logic to generate a tail-light putting-off signal by detecting the starting off point of an engine and checking the discharged degree of the input voltage. A putting-off switch(S2) is turned on/off by a signal from the engine managing system. A voltage isolating relay(RY2) isolates voltage to the tail-light relay(RY1) by turning on/off through the putting-off switch(S2). Relay terminals put off the tail-lights by isolating voltage to the tail-light relay(RY1) through the voltage isolating relay. Thereby, the discharge of the battery is prevented.
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