Control line simple detector

The utility model discloses a control line simple detector comprising an input terminal, an output terminal, a 12V power adaptor, a buzzer, a cement resistor, a reserve switch, a 12V bulb and a plurality of detection joints; the 12V power adaptor is connected on the input terminal; the input terminal and the output terminal are connected with the buzzer, the cement resistor and the reserve switch in a parallel manner; the output terminal is connected with the detection joint; DC 12V safe voltage is employed as detection power; potential difference will be generated on two ends of the resistor when currents passes the cement resistor, i.e., voltage is generated on two ends of the resistor; the voltage generated on two ends of the resistor increases along a rising current, and when high sufficient voltage is generated on two ends of the resistor, the buzzer connected with the cement resistor in a parallel manner will make sounds, so whether the circuit is in short-circuit or not can be detected; a detector and