How to Find Faulty Points on a Wire?

Wires are the primary source of any electrical circuit. But they wore out and damaged with time. They even start to break, making the whole circuit of no use, and also dangerous. Use a standard millimeter to work as a locator of any sort of wire breakage. It identifies the damage while performing a continuity test on any kind of circuit. When you detect the damage, fix or replace the wire. A cable when breaks, it causes the intermittent failure in our vehicles, any electrical appliances, or any other equipment. For instance, while your car is moving, if the wire breaks, it will stop all electrical output. It will reoccur whenever the wire piece disconnects or breaks. While fixing the same, you should be extra cautious and apply all precautionary measures. Working with any Power chords, without taking the prior precaution is hazardous. Be careful of switching off all the devices, and while fixing the same, wear a pair of rubber gloves. Then try finding the weak points with the help of the various electrical fault finding instruments.

How to find a broken/faulty wire


To find the broken wire, you will have to test the whole device. Do this with the help of a digital multimeter. A multimeter is a hand-held tool that measures the outflow of the voltage, resistance, capacity, and amperage.  Found in both manuals as well as digital form, any multimeter supplies the power required to conduct any electrical test. Follow the stages below to locate the broken wire. 

The items you require to detect the broken wire –

  • Digital multimeter
  • Wrench, 
  • Small mirror, 
  • Flashlight, 

Stage 1

Initially, disconnect all the power sources of any vehicle or electrical apparatus, which consists of the wire which you have to troubleshoot. Or else use a wrench to disconnect the car battery’s cable.

Stage 2

Then try inspecting the connections very minutely at both the wire ends to locate the actual damage. Try doing this only if they are readily accessible. Pull the wire ends a bit and hook the connectors to it. Be sure to attach the same tightly.

Stage 3

With the aid of your index finger and thumb, trace the wire length. Pay close attention to any kind of imperfections in and around the insulated wire. Get hold of a small mirror and a flashlight to reach the damaged spots, where the access is minimal. When the insulation shows any damage signs, with dark and burnt areas indicating the overheated areas. It has caused the breakage of insulated wire.

Stage 4

Next, unplug the connector with the attached wire. 

Stage 5

Then set it to continuity with the aid of a digital multimeter. Or else use the ohms scale of lowest range for the same. 

Stage 6

After switching on the digital multimeter, touch the probe to the metal terminal holding the wires with the connector. Touch the other probe to the exposed wire ends, where it joins the connector. Wiggle a bit with the cable to check to locate any sort of false connection, while you probe the terminal. The multimeter reading should indicate zero resistance. If it displays infinite resistance if appropriately, the wire not connected to the terminal. If equipped with a connector, test the pier at the ends.  

Stage 7

Following this, the next should be connecting the meter probes to the wire end and the other probe to the other wire end. Hook them well with the alligator clips to the wire ends. With utmost care, wiggle or bend the wires to the various points. If there is a wire break at any spot, the display on the readout will show infinite resistance.

Stage 8

The point of the suspected breakage, insert a pin of about two or three inches away from the main point. At the other end, also add a pin. Then connect the multimeter probes to the bolts and wiggle the wire at the breaking point. Once you shake the cable, if the multimeter displays infinite resistance, the breakage is detected.  

Reasons behind broken/faulty wires

Apart from old and worn-out wires, other related problems are leading to wire breakages and short-circuits. In old constructed houses, these all wiring damages or dries up. They also erode very fast. Many places have the damages done by the rodents, who chew these wires, causing harm.  If the meter boxes or the house wiring has loosely fit or soldered cables, they too set apart very fast.

How to fix a broken/faulty wire


Fix the wire breakage problem after you are through with detecting the wire breakage issue with the help of a digital multimeter. In most cases, the broken wire requires the entire replacement. Before every installation, check the new cable with the multimeter. It is to ensure that they do not break! During the festive season, most of us Christmas enthusiasts like decorating houses and trees with the help of spt-1 and spt-2 wires. But then we should also be aware of the electrical mishaps or damages if not installed in the right manner. These wire connections go well past any periodic lighting. The primary difference between Spt-1 vs. spt-2, is of the insulation thickness.Spt-2 has more insulation thickness than Spt-1. You have to be well-versed with the fixing of these wires, once they break.

Tips and cautionary measure

  • While working on any kind of automatic electrical circuit, it might not be possible to reach the wire end, owing to its length. 
  • Get hold of a jumper wire, placing it between one end wire end and the other to the end of the probes.
  • Seal the damaged areas with the electrical black/red tape so that the moisture does t damage the wires. Any locked moisture inside will automatically lead to electrical or short circuit problems. 


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