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The safety function of the automobile wiring harness must be fully guaranteed. Once there is a problem with the automobile wiring harness, it will affect the normal operation of the car function. Therefore, the cause of the damage to the automobile wiring harness during the use of the automobile wiring harness must be analyzed in detail and timely measures shall be taken.

1. When the wire harness of the automobile is replaced with a wire, the wire is not selected as required (the wire is too thin), and a large voltage drop occurs during the passage of large current and heat is generated, causing the wire skin to age and damage gradually;

2. When the battery is installed, the thick and thick leaves, the positive and negative polarity are reversed, the short circuit in the alternator, the insulation pads and insulation sleeves are damaged, and the alternator's magnetic field wire and ground wire are reversed, which will cause the wiring harness to burn;

3. Automotive wire harnesses are often fixed with thin iron pickups. The edges are sharp like a knife edge, and the appearance of the iron pickups is not insulated. The vehicle oscillates and fluctuates during long-term travel. The power harness can not help being worn, cut, and grounded. Form a wire harness for incineration;

4. When the automobile wiring harness is temporarily connected to electrical equipment, the fuse currents are not cleared into and out of the fuse, that is, the power cord is randomly drawn out, or the fuse is not replaced as required, or the fuse is replaced by thick copper wire. Device, which lost its protective function and burned the wiring harness;

5. The two poles of the ammeter often use plastic insulation sleeves. The plastic has poor heat dissipation. It must bear the current, but also withstand fluctuations and oscillations. If the ammeter wiring is loose or the touch is not good, it will cause the temperature to rise, causing the plastic to melt. The burning of iron, forming a wiring harness;

6. The post connection is unreliable, a large voltage drop occurs and heat is generated. Over time, the insulation gasket will be damaged and the ground will be shorted. Pay attention to the connection post of the ammeter and other instruments, and the other wire connection screws fixed to the frame terminal board should not be too long, to avoid grounding and burning the wiring harness.