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Symptoms of Wiring Harness Failure

Jun. 06, 2024

The wiring harness is a system of connectors, wires, and terminals that allow electrical components of your Volkswagen to function at their best. In addition to keeping electrical components (i.e. headlights) running, it also serves as a barrier between certain electrical components of the vehicle and external hazards.

The vehicle wiring harness prevents electrical and other types of damage to you and your vehicle. A vehicle that runs with a wiring harness will last longer than if each wire was run separately, giving you more durability.

The automotive wiring harness plays an important role in your car, so it is a critical component that requires regular inspection and maintenance to ensure the safety of you and other drivers. If you suspect that your car's wiring harness is damaged, you should have it checked by an auto mechanic immediately, as a malfunction can lead to further complications and unnecessary expenses.

Automotive Wire Harnesses

 Automotive Wire Harnesses

Common Symptoms of a Faulty Wiring Harness

Depending on the location and severity of the damage to the automotive wiring harness, one or more of these symptoms may occur. Driving with this type of damage can lead to a variety of dangerous risks, including increased risk of fire and reduced visibility due to improper road lighting.


Headlights or tail lights not working

Automotive wiring harnesses to ensure that electricity reaches the vehicle's headlights and taillights. If the vehicle's wiring harness is damaged, it may cause the headlights or taillights to not work.  Another sign is whether the lighting becomes dim, especially on a consistent basis.


Certain electrical functions stop working

If any of your car's electrical functions don't work, this could indicate a broken or damaged car wiring harness.  These could be functions such as the battery, lights, or alternator.

 Wire Harnesses for Automotive

 Wire Harnesses for Automotive

Ignition Failure

Ignition failure can be a sign that the car's wiring harness is damaged, whether it's a common problem or just a one-time occurrence.


A dead battery or starting problems

If your car's battery is dead, or if it drains quickly, this is a sign of a faulty wiring harness. Likewise, if your car accelerates or idles unexpectedly, it's another sign of a damaged wiring harness for automotive.


Common Causes of Wiring Harness Deterioration

Just like any part of your car, the automotive wiring harness will deteriorate with age. Older models are most likely to be affected by a damaged wiring harness and are likely to experience this damage due to infrequent maintenance checks. However, even just regular wear and tear can harden the harness and cause areas to soften and deteriorate.

Temperature fluctuations can also lead to harness failure. When exposed to rapidly changing temperatures (e.g., extremely cold to extremely hot), the harness may bend. Wire harnesses can withstand extreme temperatures (since they are usually located near the engine). Nevertheless, it is best to avoid rapid changes from one temperature extreme to another.

Severe weather conditions are another issue. Due to extreme weather conditions, automotive wiring harnesses can become corroded.  Exposure to road salt can also increase the corrosion of the wiring harness, which can lead to a shortened life if exposed for a long period of time.

New East Asia is a leading and renowned automotive wiring harnesses manufacturer in China and can provide you with custom wiring harnesses that have been specifically designed to meet your individual specifications and requirements. We are currently certified to ISO9001:2016, ISO13485:2015, and UL. If you want to get more information about the best automotive wiring harnesses wholesale price, welcome to contact us.

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