The high-voltage wires of the vehicle play a very important role for the power unit, since they transmit electrical pulses from the coil on the spark plug. It is worth noting that the intensity and timeliness of the inflammation of the air-fuel mixture depends on the efficiency and serviceability of the wires, and hence the uninterrupted and correct operation of the motor. Contrary to its simplicity, the wires have a lot of diverse "sores" and are able to deliver many trouble to their owner, which one way or another will reflect on his pocket and nerves. About this further in the article.

High-voltage ignition wires, what tasks and requirements are assigned to high-voltage wires

First, high-voltage wires must be sufficiently resistant to the aggressive medium in the subcontrol space.

Secondly, they must withstand the temperature from -60 degrees Celsius to +240 degrees and should not lose their conductive qualities.

Thirdly, it is necessary that the wires prevent the current leakage at all before connecting to the tips of the candles. Faulty either low-quality wires can output certain car devices, for example, an electronic system, as well as complicate the operation of the motor, as a result of which the power unit will start "troit".

Faulty wiring that threatens the car

Increased resistance or current leakage lead to a decrease in the power of the pulse and as a result - or to slowing the ignition, or to the "fading" and "Troenment" of the motor at elevated revs, or at all to the absence of a spark, especially if there are small contamination on candles. As a result, the dynamics falls, the toxicity of exhaust and fuel consumption (four to seven percent) is growing.

Ignition wires, major malfunctions

The main problem associated with high-voltage wiring is the problem of ignition candles as a result of an insufficient voltage. Causes of such a malfunction:

1. Bad contact or its absence between high-voltage lines and candles.
2. Wire resistance above acceptable.
3. Voltage leakage as a result of poor insulation quality.
4. Clamping cables insulation.

In the ripped high-voltage wiring, an electrical discharge is carried out, where the loss of voltage occurs. As a result, an electromagnetic pulse is already fed to the candle, and not the rated voltage. Damaged high-voltage wiring can cause incorrect operation of many car sensors caused by the engine operations, since the ignition in the cylinder is carried out with the receipt, and it is not always able to work, due to which it does not rarely fail to synchronize the cylinders.

How to choose quality high-quality high-voltage wires, to pay attention to

When buying high-voltage wires, not only their brand and manufacturer's firm should be taken into account. Special attention must be paid to the model of the motor. And it is due to the fact that the manufacturer in the design of vehicles lays specific standards of wires that need to be considered when replacing or repair.

One of the criteria for choice is the voltage to which the cable is calculated. If the wire does not stand the voltage, then a breakdown may occur in isolation, as a result of which the wire fails. In addition, when choosing, it is necessary to take into account the material from which the cable is made. The wire must have optimal flexibility, as well as to be resistant to high temperatures and influences of chemically active materials.

High-voltage multimeter, what is this device and how it works

The multimeter is a universal device for measurements (resistance, current, voltage, wire checking for a breakdown). For any of these measurements, special tools can be applied, namely a voltmeter, an ammeter, an ohmmeter. To measure the voltage, a voltmeter is used, the current strength is measured by an ammeter, and the omemeter is used to measure the resistance, but the universal device for measuring the resistance, current and voltage is the multimeter, the principle of which is to compare the reference signal with the input signal. At the heart of a digital type multimeter - a dual integration ADC.

How to check the wires visual inspection to pay attention to

First of all, you should check the high-voltage wires for the presence / absence of visible damage (fractures, cracks, and so on). Then you need to make sure there is no breakdown, which is determined even without the use of instruments. It is enough to look into the pumproom space in the dark - in the presence of a breakdown in the process of operation of the power unit at the high-voltage wire, the spark will be visible. In addition, you can check the high-voltage cable using a conventional wire, which should be armed with a piece of wire stripped on both sides. Further, in the dark, one end is closed on the body of the car, that is, on the "mass", and we spend the entire perimeter of the other than the entire perimeter of high-voltage wires, as well as caps, joints, and so on. At the site of the breakdown is a spark.

How to check high-voltage wires using a multimeter

1. Turn on the module mode.
2. From the candle of the 1st cylinder, remove the high-voltage wire, and then from the ignition coil.
3. To the ends of the wire, connect the electrodes of the multimeter and look at the testimony.

Resistance in good wires should vary within the boundaries of 3.5-10 com, depending on the type of wires. The resistance data is most often indicated on the insulation of the wires.

Profi advice, which must be taken into account when checking high-voltage wires

It is necessary to check each cable. It is important that the scatter is not exceeded between them - 2-4 coma. If the scatter is large, the wires should be replaced. By the way, the wires change in the complex, that is, all together.