Features and Benefits:
Checks to see if wires, fuses, switches, and other electrical systems will carry current. Important: This is not a circuit tester, do not use on live circuits. The A23 battery, provides the current necessary for testing. Install battery positive end towards the wire and clip. Any external voltage will burn out the bulb. Just clip lead to one end of wire or component in question, and probe the other end with tool. If bulb lights up, there is continuity. If bulb fails to light, the circuit is open.
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