Automotive Wiring Harness

  • As the automotive industry continues to advance, electronic components increasingly require engineers to save space.
  • Additionally, electronic parts need to accommodate other modern car requirements. A wiring harness connects a car’s electronic parts.
  • Besides, it transmits signals throughout the vehicle. The role resembles that of the human blood vessels and nerves.
  • At CLOOM Tech, we customize and produce the best automotive products. Our efforts contribute significantly to the development of the global automotive industry.

Aluminum Harnesses

At CLOOM Tech, we take the requirement of weight reduction seriously.
In this regard, we comply with the latest automotive requirements of less fuel intake and safety.
We use strong aluminum wires in the engine products to minimize weight and other expenses.
Aluminum Harnesses


CLOOM Tech applies durable aluminum wires to manufacture automobile products. We no longer rely on copper and other standard aluminum wires.

Along with good strength, aluminum harnesses have high bending properties. That reduces the weight and expenses of auto products.


The bending and strength factors of the materials we use are twice those of conventional materials. That facilitates a proper weight decrease of the wires.

The properties will also allow you to use our products even in vibrating and winding engine parts.

Wiring Harness for Sliding Door

These products provide constant power to sliding doors. Besides, they transmit signals to and from the car body to the doors. CLOOM Tech’s sliding door products consist of autonomous flat cables. Apart from flexibility, our products have small sizes, less weight, and sections.


First, it follows a steady motion path (always slides in one direction).

Secondly, it fits even in narrow spaces within the doors.
Lastly, it reduces unnecessary noise.


We combine the cables and the spinning components to protect the moving tracks. Furthermore, this brings compatibility to the opening and closing of sliding door tracks.

EPB Harness Integrated with Wheel
Speed Sensor

We integrate a wheel velocity sensor and an EPB harness. It is important to note that the electrification of supplementary parts with EPB facilitates the technique.This reduces product weight and production expenses. Furthermore, the method reduces the unit price of products. Still, car manufacturers can save on installation costs.

Integrated EPB Wheel Speed Sensor Technology

We incorporate the wheel speed sensor and the EPB harness by joining two ABS cables with two EPB cables.

We reduce the working time of assembling parts and cars.

By streamlining the routing design for automobile companies, the technique reduces the weight of cars.

Integrated EPB Wheel Speed Sensor Properties

You can easily integrate multiple driver-assistance functions to counter service brake failure.

The exclusion of incompetent brake lever provides extra interior designing options.


Automotive cables — Automotive Jumper cable

Jumper cables, booster cables, or jumper leads are perfect for when you find yourself stranded on the side of a highway. You can be back on your way in five minutes with just these few simple steps!


Cloom’s Battery Jumper Cables come in three sizes: 4 AWG, 2 AWG and 1/0 AWG (0 gauge) with lengths ranging from 10 to 20 feet. They are perfect for any kind of car that is on the go!

Made with UL listed cable, seamless tinned copper ring terminals and adhesive lined heat shrink, these heavy duty wires can withstand UV light as well as water and fungus for years to come.

Cloom’s heavy-duty clamps have a copper ribbon that connects both jaws so BOTH sides of the clamp provide power to the battery when starting.


The innovative design of these jumper cables makes them the best for starting large diesel trucks, heavy-duty fleet equipment like cars and semi-trucks. 

Made with premium materials that are designed to last in even cold weather conditions!

Copper cables which are 100% pure come with adhesive lined, irradiated polyolefin (PO) heat shrink to keep water and fungus out. Additionally, the PO is exceptionally resistant against UV light for long-lasting protection.

Automotive cables — Automotive Battery Cables

Battery cables play an integral role in your vehicles entire electical system allowing you start-up function with ease.


Cloom assembles various sized copper wires like 4 AWG, 2 AWG, 1/0AWG and 4/0 AWGs in order to suit any customer needs!

Cloom manufactures battery cables that are perfect for use with DC to AC power inverters and can be used in many other applications.


Our battery cable comes with either 5/16″ or 3/8″ ring terminal depending on how much current it can handle at once before overheating.

The Adhesive-Lined Irradiated Polyolefin (PO) heat shrink makes the cables more water resistant, fungus proof, and UV light resilient than ever before!

Automotive cables —Automotive Lift Cables

The cables responsible for making sure the swing arms are level and the vehicle is lifted evenly when raising or lowering a lift should be inspected monthly.


We spend years of research and development with OEMs to create cables that not only meet their quality standards but exceed them.

The maintenance team performs frequent pull strength and breakage testing on our lift cables or equalization cables to ensure high-quality products.

We take pride in providing quality auto lift cable products with OE specifications or custom lengths made from high-quality materials at affordable prices.

Cloom offers a variety of cables for different lifts, so you can easily find the right one to suit your needs.


All cables are made in China and assembled in our manufacturing facility.

We use only the highest grade of 12L14 cold drawn steel in our parts because we know that it will withstand tough conditions and last longer than any other metal on earth, thanks to its long-lasting properties.

Stainless steel rope is the toughest material out there. You can’t beat it for extreme applications and anything that needs to be strong, durable, or long-lasting in order to stand up against heavy use.

Quality Assurance in Manufacturing

A wire harness is an essential product for car efficiency and safety. Even slight faults, such as a stereo failure, can irritate you. Moreover, significant failures, like driver-assistance system failure, can offset your vehicle’s efficiency and safety. Therefore, you need the quality assurance of such products. At CLOOM Tech, we acknowledge that low-quality products can be more than an inconvenience.

 It is a matter of life and death to us! That is why we customize and manufacture our products to precision. This guarantees our customers the best quality and safety.

CLOOM Tech products meet SAE and IPC/WHMA-A-620 quality standards. Additionally, our products are ISO compliant. For your information, CLOOM Tech is UL and CSA certified. Our manufacturing factory also complies with RoHS standards. 

Still, for the safety of the environment, we practice green production processes in our daily activities. In particular, we champion the recycling of waste products.

Our Partnerships with Top Manufacturers
and Suppliers

CLOOM Tech has rich experience in wire harness manufacturing and supply. We boast of our outstanding reputation worldwide. Also, we consider flexibility and a professional approach as the pillars of our success.

We customize and manufacture our products according to client specifications. First, our engineers take time to understand customer vision and specifications for custom products. Then, they apply extensive research and their engineering knowledge to come up with innovative and low-cost solutions.

We partner with reputable suppliers to have an extensive, internal inventory of the best interconnect raw materials. Our collaborations further ensure that our clients get the highest quality products of their choice.

These are some of our partners who complement our manufacturing and supply efforts:

Custom Cable and Wire Harness

We provide full-cycle design and manufacturing services. On top of that, we offer extra value-added services that meet customer specifications. We produce nothing other than the best quality products. CLOOM Tech custom products can accommodate different wire numbers and colors.

Our manufacturing capacities are not limited to:





Sub-assembly integration

Ultrasonic wire welding.

Terminal use




Types of the automotive wiring harness

Lead Wire

The lead wire is convenient in joints with multiple connections. The presence of a single cable in a box makes it easier to make internal electrical connections.


AVSS wires are thin-walled, have many stranded conductors and bending properties. Besides, they are resistant to both fire and heat. That makes them withstand the adverse engine environment.


The FLYY can accommodate thin walls and low-voltage typical in the automotive industry.

Custom Automotive Wiring Harness Services

Wire markings play a significant role in minimizing labor throughout the assembly process. CLOOM Tech’s unlimited service teams strive to make the highest quality products. We provide product interaction from the beginning to the end. Additionally,

 our support team responds promptly to customer inquiries. Likewise, we complete engineering requirements within hours instead of several weeks and months. That allows your assembly and R&D to be ahead of schedule. Contact us today for the highest quality products.

Some of the services we provide include:

Quote response within one day

Product testing and visual inspection

Sketches provision

We support both small and large scale production

Customized cable codes and labels

Buying of connectors and wiring harness production

Applications of Automotive Wire Harness

Automobiles apply a wide range of wire harnesses for the highest possible performance. These wires combine the wiring of various electrical and electronic equipment into one system. The integration injects efficiency into a vehicle’s power and signals transmission system. 

We customize and manufacture these products according to a customer’s electrical and geometrical needs. You can embed these wires into your car’s body, sliding doors, power windows, engine, and others.

Below are the common uses of these products:

Automotive and long trucks

Motorbike assembling.

Golf carts

Smaller trailer harness

ATV and Karts repair

Farm machinery and garden tools

Aircraft and planes

Are You Ready To Boost Your Sales With Our
Manufacture Solutions?

Get a quick quote now.

Automobile Wire Harness – Growing Demand in the Automotive World

Automobiles need a wide array of wires to perform the various functions. In recent years, technological advancements inform the design of cars. Such advancements also impacts on the best automobile wire harness one can use. Thus, such wires are essential for various car systems for easy vehicle operation.

The Engine Control Unit of A Car
The Engine Control Unit of A Car

The growing demand for wire harness for automobiles has seen many companies provide solutions regarding the same. One needs to understand the different types available to make an informed choice. Herein, we assess the automotive wire harness and everything to know about them before a purchase.

1. Automobile Wire Harness

An automobile harness is a set of wires, connectors, and terminals. They can connect different parts of the vehicle to achieve various functions. The cables run throughout the automobile system to transmit electric power and relay information.

2. Primary Wire for Automobile Harness

Close up of An Electrical Cable
Close up of An Electrical Cable

Cable assemblies for automobiles require a different set of wires to guarantee efficiency and functionality. There are primary wires that every automobile harness must-have. Some assemblies have specialized cables to allow for specific functions or enhance the existing ones. Here are some of the primary wires for an automobile harness;

2.1 Low Voltage Wire of Automotive

The wires a manufacturer uses in the automotive harness determines the current that goes through them. Automobiles require low voltage wires to reduce the risk of injury or damage when diverted. There are many ways to determine the voltage that an automobile harness accommodates. Having specifications when buying the wires is crucial when dealing with low voltage wires of the automotive. Several factors influence the release of pressure from the electrical circuit, which translates to voltage. Some of them are;

2.1.1 Construction of The Conductor

The conductor allows for the transmission of electrical power from one part of the automobile to the next. Choosing this metallic part is one of the significant factors that affect various components, including voltage. Automakers must note the material used to make the conductor alongside the artistry. Other than the material the manufacturer uses for the conductor, the length and thickness also affect voltage. Aluminum is the preferred metal for a low voltage wire of an automotive. Working with custom automotive wire harness companies make the selection effortless.

Macro Detail of an Electrical Cable
Macro Detail of an Electrical Cable

2.1.2 Insulator of Wire

Insulation is a vital part of any cable assembly as it prevents the electrical wires from coming together and causing havoc. Low voltage wires must have insulation for various reasons, and the insulator of wire should be appropriate for the application. Different insulation types are available for the various parts of the assembly to ensure safety for the auto-user.

PVC and cross-linked are the two types of insulation that are typical for an automotive harness. These two differ in terms of the temperature range. Cross-linked insulation withstands more heat than PVC, making it the best choice.

Electrical Wire Cable Showing the Different Parts
Electrical Wire Cable Showing the Different Parts

3. Automobile Wire Harness Types

Distribution Block of an Electric Car with Connected Sensors and a Signal Distribution Cable

Distribution Block of an Electric Car with Connected Sensors and a Signal Distribution Cable

Different types of automobile wire harness are available in the market, each with unique qualities to perform specific functions. Knowing the various types available makes it easier to get an assembly that serves the intended purpose. The different kinds of automotive wire harness available in the market include;

3.1 Stranded Wires and Shielded Wires for Vehicles

Vehicle wire harness features a diverse range of cables with distinctive characteristics. Stranded and shielded wires perform different roles and are a must-have in automobile harness.

3.1.1 Stranded Wire

IEC Standard Electrical Cable Showing Stranded Wires
IEC Standard Electrical Cable Showing Stranded Wires

Strands are a combination of several filaments of wire to form a unit. Each collection of cables serves specific electrical and mechanical functions. Therefore, selecting the materials and the processes must be top-tier. The construction of stranded wires can satisfy individual requirements. It is important to note that stranded wires may be less durable than the solid ones. Less durability is due to the individual strands’ and delicate nature. The electromagnetic effect of stranded wires plays a vital role in the normal functioning of an auto system. Additionally, it plays an important role in reducing any sort of danger to vehicle users.

3.1.2 Shielded Wire

Twisted Pair Cable with Shielded Structure
Twisted Pair Cable with Shielded Structure

Comfort and superior performance are the top things that people consider when shopping for an automobile. Several factors affect these factors, including the harness an automaker uses in the construction. The shift from manual to automatic transmission has prompted cable assemblies that work with the new system’s requirements. Shielded wire enhances and protects the data transmitting from one part of the system to the next. Precision and timely delivery are necessary for safety purposes. Automatic automobiles utilize electronic components for the various functions. These automobiles sense the slightest change in environmental factors to determine the best driving conditions. Shielded wires enhance such digital features to work efficiently.

3.2 Stereo Relocation Harness

Audio System with Amplifiers and LCD Monitors in a Car Trunk
Audio System with Amplifiers and LCD Monitors in a Car Trunk

The stereo system in a vehicle is among the many parts that you can restructure using a harness. Connecting this part to the others in the car requires a comprehensive harness that only custom manufacturers can offer. The stereo relocation variation is available in different types. Below we discuss some of the stereo relocations harnesses that custom cable manufacturers avail for automakers and users.

3.3 Amplifier Integration Harness

Automobiles come with a stereo system for entertainment purposes put together by cables. An integration harness is critical in supporting the unit’s electrical and mechanical functions. When installing an aftermarket radio, the amplifier integration harness will help install and connect to the inbuilt amplifiers. Replacing these amplifiers is also possible with the integration harness

3.4 Amplifier Bypass Harness

The factory unit that comes with the automobile from the production company supports the subwoofers and speakers. A bypass harness comes with the inbuilt amplifier to permit and enhance the various functions of this system. An amplifier integration harness comes in handy when you want to customize your stereo system to meet specific design needs. It also allows you to change the inbuilt system with that of your choice painlessly.

3.5 Chime Retention Harness

Alerts are necessary for an automobile to indicate system issues, and the chime retention harness plays a key role in this responsibility. If your automobile has any problems, this system will send a specific alert to help your mechanic identify the problem. You can then fix it before it causes further damage to the automobile. For instance, if your fuel or oil is running, certain low lights will come on. The chime sound will also draw your attention to this issue. Any changes to the stereo system, such as installing an aftermarket unit, will disable certain functions. With the chime retention harness, you get to keep the alert system irrespective of its changes.

3.6 Premium Harness

The premium harness performs multiple functions within an automobile system to give you the ultimate user experience. This assembly facilitates the specialty services of a car, depending on the model you have. It plays a vital role in empowering the chime system as well as the amplifiers in an automobile. Customizing the premium harness is possible after purchase by eliminating the unwanted bunches to streamline such a system’s various functions.

4. How to Remove a Wire from an Automobile Harness

Terminal Boxes and Multi-colored Electric Wires of an Automobile Wiring with the Removed Internal Covering
Terminal Boxes and Multi-colored Electric Wires of an Automobile Wiring with the Removed Internal Covering

Some wires in an automobile wire harness may not serve any function in your vehicle. You can, therefore, remove or disconnect them to achieve a neat look. Some assemblies are complex, and tampering with a single wire can lead to the entire harness’s malfunctioning. Before removing any wire, you should understand the harness and how it works. Specific steps are crucial in removing cables from a harness to prevent accidents and damage to the vehicle. Some of the steps to keep in mind when removing a wire from an automobile harness include; 

Step 1 Disconnecting the Fuse Block.

Disconnecting the fuse block is crucial in the successful removal of any wire from an automobile harness. The fuse block is always in the upper right side of the engine compartment. Once you locate the fuse block, disconnect the center bolt holding it in place. The next step is to identify and disconnect this part from the chassis, transmission, and the engine.

Step 2 Remove Bolts or Dashboard Seams.

Bolts are holding the wire harness together and connecting it to the fuse box placed sideways together with the windshield. Trace and identify the different ones holding the harness wires in place and remove them using the appropriate socket wrench. There is no standard size for the bolts as the sizes vary from one model to the next. For some vehicles, the seam around the dashboard replaces the bolts. Identify where the seams are and gently tear them apart, preferably using a flat head screwdriver. Trace all the bolts or seams holding the dashboard and steering wheel in place. Remove them to gain access to the wiring in the back.

Step 3 Disconnect the Wire.

After the dashboard is out of your way, you can access the wiring harness. Disconnecting the cables requires accuracy to ensure no damages to the vital wires. Run a strong thread through the firewall hole and the engine section. Attach the rope to the end of the fuse block. Pulling this thread allows for easy disconnection of the wires. Identify the wire you want to remove from the harness afterward and disconnect the various connectors and sheaths carefully. Besides, it is vital to avoid damaging the harness in the process. Find a better way to document the connections for reassembly after disconnecting the wires. A picture or video will help you get things back on track effortlessly after getting rid of a wire from an assembly. 

5. Benefits and Applications of Automotive Wire Harnesses

New Engine Technology From Pickup Car
New Engine Technology From Pickup Car

Automobiles rely heavily on harnesses to power the various functions and enhance others. No vehicle can operate without effective communication between the multiple systems. Automotive wire harnesses entirely ensure smooth and effective communication operations. The design of a vehicle and its functionality are the top factors that affect the wire harnesses’ choice, benefits, and applications.

5.1 Applications of Automotive Wire Harnesses

Wire harnesses in a vehicle have numerous applications. The different parts of an automobile require an assembly of cables to transmit information and electrical power. The electric current is necessary to power the various automobile functions. The engine, body, and chassis of a car are among the key components that rely on wire harnesses. Such components need the energy to sustain essential functions and propel the movement of the auto. 

The engine wire assembly runs the primary functions of a system. It includes braking, cruise control, lock, and speed sensor systems. The battery power also requires cables to reach the various parts of the vehicle. Many other components within the engine need wire harnesses to ensure the car runs. Interior electrical elements, windows, and the dashboard are among the parts that require the body harness to function normally.

New Car Engine
New Car Engine

Many other connectors and systems, such as air conditioning, are among the applications of automotive wiring harnesses. The chassis holds an array of interconnected parts that rely on wire harnesses for electrical and mechanical power supply. These applications are necessary for all vehicles, although the design will vary for different automobile models present in the current market.

5.2 The Benefits of Automobile Wire Harnesses

Minimal Installation Time

Automobile wire harnesses accommodate numerous applications and allow for the same setup in a single system. Installing single wires for the innumerable functions present in a vehicle is time-wasting.  Additionally, it will take a more extended period before a single unit is complete. Automobile wire harness manufacturers reduce the installation time significantly by availing comprehensive solutions that are easy to install. 

Reduced Possibility of Short Circuits

Short circuits often happen for single wire installations due to the complex nature of such a setup. Automobile wire harnesses to ensure that the assembly is flawless, cutting the risk of short circuits considerably.

Greater Resistance to Extreme Conditions

Automobile wire harness producers take into account the various factors that affect the longevity of cables in automobiles. They then tailor the market’s needs with these factors to develop products with high resistance to chemicals and environmental factors.

Better Fuel Efficiency

Transmission is among the factors that affect fuel consumption. Having a system that functions effectively without any mishaps ensures better fuel economy. Automobile wire harnesses streamline the functions of a vehicle leading to better fuel usage.

Enhanced Performance of Hybrid Cars

Hybrid vehicles combine the good aspects of the conventional system with modern electric propulsion systems. Wire harnesses are the link between these two systems and elevate cars’ performance in this category.

6. Tips for Choosing the Best Automobile Wire Harness Manufacturer

1. Automobile Wire Harness–Emphasize on Excellent Communication

Communication is vital in any purchase, and that of an automobile wire harness is no exception. From the first interaction, you can gauge whether a manufacturer is the right fit for your automobile wire harness needs or not. The customer support team should be professional and responsive to guide you through the selection process. They should also avail of all the necessary information regarding the company’s services and products.

2. Automobile Wire Harness–Seek Out Testimonials and Reviews

The Internet is an ideal place to review the cooperation of wire harness manufacturers. Reviews from experts and testimonials from previous clientele are critical in helping you make an informed decision. Both negative and positive feedback is necessary for helping you gauge the various aspects of the company. From the reviews, you can tell whether the company has premium quality wire harnesses and excellent after-sale services or not.

3. Automobile Wire Harness–Create Sketches

The best automobile wire harness manufacturers can create sketches for you before they start the production process. Companies that can develop illustrations are the best choice since you know what to expect after completing the job. Creating sketches also makes customization easier since all the requirements must be part of the company’s graphics. It can help you evaluate whether the company can meet your needs.

4. Consider the Environment Which Your Harness Will be Operating In

Environmental factors affect the functionality and durability of a harness, among other factors. A manufacturer should be able to provide solutions with this aspect in mind. Some companies do not have specific provisions making it hard for you to get a unit with certain protective features. Such elements are essential in protecting the harness from damage.

5. Automobile Wire Harness–Inspect the Fabrication Plant

The fabrication plant’s inspection is the fact that most renowned manufacturers in this realm accept without qualms. A physical visit to the plant makes it easier for you to see how the company operates. It will help you determine if they meet the standards set by regulatory bodies.

7. How to Select Automotive Wiring Harness and Connectors?

Many automakers and other buyers may have difficulty picking the right automobile wire harness and connectors. It is primarily because numerous variations flood the market. Certain factors are critical in guiding one in the selection process. Below we discuss the vital factors to consider when selecting an automotive wiring harness.

Automobile Wire Harness--Car repair Showing the Wiring System
Car repair Showing the Wiring System

7.1 The Principle of Selection Connectors

7.1.1 Selection Principle of Automotive Wiring Connectors

This principle dictates that the automotive wiring connector must be suitable for the cross-sectional area. There are different types of connectors available, and each type of connector should be suitable for the connector used by the manufacturer. Other than the cross-sectional area, many other factors determine the connectors’ choice to ensure maximum safety and superior performance. The choice of material is also inherent in selecting connectors as it informs aspects such as efficiency and durability.

7.1.2 The Raw Materials (materials) of Connectors-Performance Analysis

1. Copper Wire

Copper and plastic are the common materials that go into the making of the connectors. They affect the performance of the wire harness in different ways.

2. Sheath (plastic parts) Material

The plastic parts need to have certain qualities to ensure the safety of the wiring harness users. Various options are available for manufacturers to use, some with better features than others. Custom making automobile wire harnesses gives the buyer the freedom to pick a variation that works well with their vehicle. Furthermore, the buyer can select an option knowing the environmental factors affecting its performance. Reinforcing and flame-retardant materials are among those that producers add to the plastic parts to improve their quality and functions.

3. Terminal (copper) Material

Copper is the most preferred terminal material for numerous reasons. Manufacturers improve the quality of this part by using alloys of copper dictated by the client’s needs. Bronze and brass are the top alloys that make the terminal material. Bronze consists mainly of copper with tin as an additive, hence sturdy.

Brass is a zinc and copper alloy, and it boasts of higher malleability, making it the best choice for particular applications. Automakers ought to assess their needs and expose the harness to external factors before picking an alloy. The different coating available for the terminal material also influences the choice of one metal over the other.

7.2 The Automobile Circuit Design

There is no one size fits all in the automobile circuit design business. Each model has different needs that inform the construction and choice of material for the various cables and connectors.

Automobile Wire Harness--Mechanic Checking the Electrical System in a Car
Mechanic Checking the Electrical System in a Car

The Design of the Power Supply System

The power supply system should be reliable and safe. It is the principle that guides the design of the power supply of every vehicle. Automobile wire harnesses play a pivotal role in ensuring that the electrical power supply is steady. It connects the different parts necessary for electrical current to move from one part of the harness to the next. 

The Design of Line Protection

Line protection is what keeps the wires intact by preventing any troublesome connections. Protection devices must have a fuse, a fusible link, and a circuit breaker to protect the cables and loop electrical elements.


Automobile Wire Harness--Detail of a Car Engine Bay with Fuses
Detail of a Car Engine Bay with Fuses

The various control systems in a vehicle require connectors to come together and perform different functions. Fuses are an intrinsic part of these connections. These systems are susceptible to electrical interference from the other parts. Harnesses need to have separate fuses from the rest to prevent the occurrence of the same. Moreover, the inductive and resistive loads ought to have different fuses for apparent reasons. We have fast and low melting fuses, each with unique uses, merits, and demerits. One needs to determine the fuse capacity as per the calculations from the operating current. It is a principle that one cannot overlook when selecting connectors for the different automobile wire harnesses.

Fusible Line

The fusible line is necessary for any automobile wiring harness to prevent the assembly from blowing up due to a huge current. The link contains a conductor and insulator that blow up to cut off the power supply that would otherwise cause irrevocable damage. This line connects directly to the battery through the circuit leading out from this part.

Chlorosulfonated polyethylene material makes the thick insulating layer that helps keep the vehicle’s damage on the lower side. This feature is available in various sizes, and automakers opt for sizes that fit with the different models they avail to consumers.


Thermomechanical devices that connect or break a connection are a must-have in any electrical setup. PTC solid materials are the materials that designers use for this part to avail of overcurrent protection. The breaker is costly but rarely requires replacement or any manual adjustments after troubleshooting.


Current and voltage type are the two types of relays that you will find in automobile wiring harness systems. The vehicle’s switch and power bearing capacity are the two factors that dictate whether to use a relay or not. Horns, wipers, fog lights, and blowers are the typical relay devices available in an automobile. Technical requirements and the relays’ purpose are the key areas for assessing this aspect when buying an automobile harness.

Ground Distribution Design Rules

When it comes to grounding, safety and consistency are the key areas to note. The entire vehicle relies on electrical power to function normally. It necessitates the need to ground the various parts differently to reduce electrical interference. Some electrical elements may have to share grounding parts to prevent using long wires that would otherwise cause a voltage drop. Manufacturers of custom automotive wiring harnesses provide details on the best way to handle grounding designs. It ensures that the engine, body, and wires have a seamless interaction for maximum functionality and user safety.

7.3 Automotive Wire Selection Design

Automotive wire selection design is another factor that one cannot overlook when shopping for a unit in this categorization. Two elements pop up regarding this aspect.

Selection of Wire Type

To select the ideal wire type, one must bear the harness’s functions in mind and the numerous external factors it will contact. Temperature, oil, friction, and vibration are among the significant factors that affect automobile wire harnesses. Different options in the market can resist high temperatures, corrosive gases, and liquids. One must understand the best materials to pick and the sheath that works best for the various parts. For instance, wires with proximity to the engine must have high resistance to temperature, water, and flames.

Calculating the Cross-sectional Area

Different working environments and temperatures affect the functions of a wire by increasing or reducing the cross-sectional area. It is the primary area of concern when calculating the cross-sectional area. Experts avail empirical formulas that one can use to calculate the size for accurate measurements. Before using any formulas available, one should understand how to get and apply the values to get precise measurements. Companies that manufacture automotive wiring harnesses provide this information as they custom make designs for their clientele. 

7.4 The 3D Layout of The Automotive Harness Design

Three-dimensional designs are taking the world by storm in the different sectors, and the automobile industry is among them. 3D layouts help manufacturers develop harnesses that fit into the automotive system painlessly. Various software in the market makes this possible, and they give automakers the freedom to alter the multiple parts and measurements to suit their needs. The 3D layout of automotive harness design is a trend that makes work easier for producers.  Using the layout, they get an idea of the best components to use to achieve particular effects. 

7.5 The Fixed Design and Entire Car Wiring Harness

The Fixed Design of Harness

The main electrical box requires stability, and it is the main component of the fixed harness design. Bolts and steel bars mount this part to the body of the vehicle. Plastic cable ties help tie the wire harness to the car using body, elliptical, or round holes. Between the sheaths, the bundles are bound by a sheath bracket that connects the system to the vehicle’s body.

The Design of Harness Wrapping

Harness wrapping is critical due to exposure to harsh conditions. The engine harness requires certain protections that only wrapping can provide. The wrap also improves the aesthetic value of the harness, making it pleasing to the eye. The wrapping design should be resistant to wear and tear, flames, corrosion, water, and electrical interference, among others. The wrapping varies from one part to the next since the exposure varies for the different parts.

The Raw Materials Performance Analysis for Dressing

The raw materials a manufacturer uses for dressing must satisfy individual requirements to guarantee safety and efficiency.

The Bellows

Bellows have numerous desirable qualities for automobile harnesses, making at least 60% of the dressing on the various assemblies. It has a high water and temperature resistance making it the best choice for engine harnesses. PP and PA2 materials are the two variations of this material that manufacturers use for dressing automobile wiring harnesses.

The PVC Pipe

PVC pipes and bellows share the same function. This material is flexible with good bending resistance, making it an appropriate choice for the branch of wire harnesses. Its heat resistance is not as good as bellows; hence, this dressing is not ideal for the engine harness.

The Tape

The tape has numerous dressing applications. Generally, the tape accounts for 30% of the dressing in automobile wire harnesses. This dressing acts as insulation, noise reduction, bundle, and wear resistance cover. There are different types available with the cloth tape having better qualities than the other variations.

7.6 The Whole Sealing Design of Automobile Wiring Harness

Sealing is essential for automobile wiring harnesses to ensure that they stay in place. The seals also keep water and other contaminants away from the wires to guarantee a long life span. Neoprene, EPDM, silicone, and natural rubber are the available sealing alternatives. Each material has characteristics that make it a suitable pick for the different parts of the wiring system. Elasticity, mechanical strength, and weather resistance are factors to evaluate when buying an automobile wiring harness.

8. 11 Things You Need to Know About Automotive Wire Harness

1. Differences Between Automotive Wire Harness and Standard Wire Harness

The main difference between the automotive wire harness and the standard is the type of connectors they use.

2. Uses of Automobile Wire Harness

Automotive wire harnesses have numerous applications. The primary use is to connect the electrical components in an automobile to convey information and relay power.

3. Design of Automotive Wire Harness

The design of an automotive wire harness varies from one vehicle to the next. The applications and automobile models dictate design and construction.

4. Types of Automotive Wire Harness

Standard, stereo relocation, amplifier integration, and amplifier bypass wire harnesses are the common types available for auto motives.

5. Advantages of Automotive Wire Harness

An automotive wire harness helps improve the functionality of a vehicle. Additionally, it is easy to install and helps one save on time and energy during installation. The dressing provides galvanization for the car and helps reduce vibrations. Better fuel efficiency and safety are also some plusses of wire harnesses.

6. Customized Automotive Wire Harness

Custom wire harnesses are vital for specific applications, and this is where specialized companies come in. They avail of the necessary expertise and production of customized systems. Knowing the project requirements is the first step towards getting a customized automotive wire harness. Choosing the right company is crucial for the manufacture of assemblies that meet the project’s needs.

7. Qualities of Automotive Wire Harness

Many factors affect the qualities of wire harnesses in the automobile industry. Durability, resistance to external factors such as heat, humidity, mechanical shocks, and unwanted vibrations are the key features to assess.

8. Tests for Automotive Wire Harness

Positive results are a must before installing an automotive wire harness. The manufacturer you pick must have the testing capacity to verify that the wire harness performs all the functions. Design and efficiency checks are fast; hence, one should not assume that it works without testing.

9. Look for Customization Manufacturer

Some manufacturers take the time to understand the individual needs of their clients and develop custom solutions. Working with a customization manufacturer is essential if one wants to get a unit that meets specific requirements.

10. Automotive Wire Harness for Alternate Energy Sources

Exploring the different options available as an energy source is a trend in the automotive wire harness manufacture business. With evolutions in the motor industry, one should find a cable assembly adaptable to the different energy sources.

11. Wire Harness With Specialized Features

Having a wire harness with specialized features improves the functionality and efficiency of the automobile. Units with additional features give one value for their money and enhance the overall characteristics of a vehicle.

9. Automobile Wire Harness–Engine Wiring Harness– Repair and Replacement

1.Why It’s Important to Repair and Replace Your Engine Wiring Harness

For various reasons prompted the owner to repair or replace the engine wiring harness. Any form of malfunction necessitates repair or replacement as well as normal wear and tear.

2. What is Your Engine Wiring Harness?

The engine wiring harness is the heartbeat of the vehicle. The cables connect the engine to the different parts that require electrical power to perform their duties. Heat resistant rubber and other hard-wearing materials make this part.

3.What Does an Engine Wiring Harness Do?

The engine wiring harness is responsible for the primary functions of a vehicle. The engine wiring harness ensures that the vehicle is up and running smoothly. Any issues related to the cable assembly herein will cause significant problems, and the car will not start.

4. How Does the Engine Wiring Harness Work?

The engine harness works by transmitting electricity and relaying necessary information to the different parts of the automobile. A fuse box and cables permit the current and signals to flow through from the engine to the various components. The transmission guarantees the normal functioning of the automobile.

5. Signs to Look For When an Engine Wiring Harness has Issues

The engine wiring harness connects to numerous sensors that display on the dashboard. Any malfunction of the sensors indicates a problem with the engine wiring harness. Problems with starting the vehicle are another major sign that the engine’s wiring harness is failing or broken.

6. Repair and Replacement the Engine Wiring Harness

Replacing the engine wiring harness is a necessary time and again. Sometimes repairs might help fix the problem while, in other instances, an overhaul is a must. Repairs and replacements for the different wires may be cheaper, especially when the other parts of the harness are intact. An expert evaluation will help establish a better choice between replacing and repairing single cables or the entire unit.

7. Where to Find Help With Your Engine Wiring Harness

Custom made engine wiring harnesses are ideal for those who choose to do the repairs instead of going to a mechanic. Although some issues are easily fixable, some are complex and require one to consult with an expert. Professionals have the skills and equipment to identify where the problem is with ease. Manufacturers with after-sale services and a responsive customer support unit can also provide insight into the engine wiring harness issue.

8. The General Cost of Fixing Your Wiring Harness

The overall pricing of fixing an engine wiring harness varies depending on the system’s brand and complexity. When buying from custom manufacturers, one can quickly get information on the approximate cost of fixing the unit they buy.

10. Door Wiring Harness: All You Need to Know

Automobile Wire Harness--Disassembled Car Door
– Disassembled Car Door

1. What is a Door Wiring Harness?

A door harness is a set of cables covered in the rubber of vinyl that rely on information to this part for it to work efficiently. The door wiring harness has numerous functions that allow for the door’s operation, starting with simple functions such as opening and closing. Let’s dive deep and understand the door wiring harness and why it is a must irrespective of what car you are driving.

2. Wiring Harness of Vehicles

For Three-wheelers

Three-wheeler vehicles like the rickshaw are among those that enjoy the full benefits of having a door wiring harness. Automobiles in this category are mostly commercial, although some are personal. Three-wheeler owners prefer installing door wiring harnesses to ensure that the users are safe. The harnesses are also durable and resistant to an array of external factors that the normal cables cannot withstand.

Automobile Wire Harness--Three-wheel Automobile
Three-wheel Automobile

For Two-wheelers

Scooters and motorbikes fall in this category; the door wiring harness for these automobiles may seem irrelevant, but it is not. People want their scooters and motorbikes to have additional features such as speakers and lighting in the contemporary world. The door wiring harness is the best option to use for such functionalities. Custom manufacture companies can tailor the individual’s needs to the two-wheeler specification they have with ease. The protective layers that automobile wiring harnesses feature offers extra protection to the wires preventing damage.

Automobile Wire Harness--Motor Scooter
Motor Scooter

For Four Wheelers

Four-wheelers have doors and require the wiring harness to ensure that they can perform the necessary functions. For automobiles that fit in this category, the door wiring harness has numerous benefits. Longevity, reliability, and efficiency are the top reasons why one should opt for this door wiring harness. Improved performance makes work easier for both the driver and passengers in the car elevating the travel experience a notch.

Automobile Wire Harness
– SUV Car with an Open Boot

3. Components of Door Wiring Harness

The door wiring harness is one of the simple ones to install. People who are not conversant with automobile wiring harnesses should hire an expert to handle the installation. It eliminates the risk of accidents and damage to the vehicle as any minor error could have fatal results. The set up for door wiring harnesses requires one to understand the door harness connection and grommet installation. This system has links to the window motor, lock switch, and actuator. All these parts have a connection to each other and the battery alongside other parts of the automobile. With custom door wiring harnesses, the setup is straightforward, and the manufacturer’s simple instructions are enough for the installation.

4. Benefits of Door Wiring Harness

The door wiring harness system has a host of benefits that draw a lot of people to them. Some of them are;

Reducing Installation Time

Multiple cables come together to ensure the door wiring harness is ready for installation. Setting up the system one wire after the other is time-wasting, and the harness eliminates this.

Helping Security and Safety

Safety and security are essential for auto users and are some of the areas that manufacturers give top priority. A door wiring harness ensures that all the wires are in place. The insulation, on the other hand, provides a protective layer for maximum safety and security. 

Improving Efficiency

A door wiring harness rings together all the cables necessary for certain features to work. It ensures that the automobile functions are at its best-improving efficiency by a significant margin.

5. Common Problems in Door Wiring Harness

The door harness is not all perfect, as is typical with most electrical units. Here are some of the common problems to expect when buying a door wiring harness;

Fixing Broken Wires Indoor Wiring Harness

Normal wear and tear are bound to happen after using the wires for a while. Identifying issues with this system is problematic, as most people are not familiar with them. Additionally, getting to the cables to fix the problem is a hassle. It will require removing certain parts of the car to get to the wires.

Customizing Door Wiring Harness

One must be cautious when getting a customized door wiring harness as the market’s car models differ. The length and design, among other things, are different; hence, the need for customization. A manufacturer should get precise measurements or guide you on measuring your car to ensure that the door wiring harness they deliver is the correct fit.

6. How to Choose the Best Door Wiring Harness

Many factors come to play when choosing the best wiring harnesses for the door and other car parts. The door wiring harness you pick must meet the requirements of the automobile you have. The quality must be top-notch with solid construction and premium materials. The insulation and dressing must all be ideal to withstand high temperatures and other environmental factors. These factors affect the wires’ durability and efficiency. If you want the best door wiring harness, it is prudent to work with a custom company. Besides, it ensures that the product you receive meets all your specifications.

11. Automobile Wire Harness– 10 Problems Caused By a Bad Battery Wiring Harness

Automobile Wire Harness
– Oxidized Dirty Car Battery Terminals

1. Engine Shutting Off At a Lower Speed

Engine shut down at low speed is one of the indicators of a bad battery wiring harness. Lose, or corroded wires are among the top causes of this problem.

2. Problems Starting the Vehicle

The automobile may refuse to start altogether. It, without any doubt, is a problem caused by bad battery wiring. If the battery has an issue, the rest of the electrical functions will fail, and starting the car will be a problem.

3. Battery Terminal Corrosion

It is a common problem that most car owners encounter, and replacing the battery may be necessary. In other instances, cleaning the terminals may solve the problem.

4. Lights and Other Electrical Components Not Working Properly

The battery powers all the electrical components of an automobile to ensure functionality. The lousy battery wiring harness can lead to a disconnect, which affects the lights and other features.

5. Connector Damage

Connector damage occurs due to exposure to certain elements. Corrosion is one of the leading causes of this problem. Sometimes the wires can disconnect from the connector leading to a break in the circuit.

6. Damage to The Wiring Harness by The Metal Panel

A metal panel in your car can cause severe damage to the wiring harness. The various reasons, including an accident, may cause the metal panel to get to the wiring assembly.

7. Water Wicking and The Damage They Cause

Water and other environmental factors such as humidity pose a great danger to wiring harnesses. Furthermore, water-wicking travels internally, and it can move far; hence identifying the problem may be a challenge. This problem begins from the connectors as water can easily seep slowly into the wires.

8. Mechanical Damage

Mechanical damage to a battery comes in various forms, which affects the wiring in one way or another. The bad battery wiring harness can cause mechanical damage, especially as the system gets older.

9. Thermal Expansion

The thermal expansion changes the shape and dimensions of cables, which is one of the worst things. Cold temperatures shorten the wires causing them to break or disconnect from the connectors. Finding such a fault is a hard nut to crack and can cause the automobile to stall for an extended period.

10. Harness Damage

Insulating foam destroys the middle of harnesses, and this kind of damage is irreversible as it hits the core. Numerous other factors can cause harness damage, and this means the entire system needs replacement. It may be costly but necessary for the automobile to resume normal functions.


You cannot compromise on quality when it comes to buying an automotive wiring harness. Finding the best company to work with is the first step towards making this possible. Also, understanding the requirements of a specific project is essential to get the correct specifications.

Numerous factors affect the choice of the company, including but not limited to cost, locality, delivery service, and experience. Reviews and testimonials from previous and existing clients play a vital role in forming opinions about a specific company. 

CLOOM Tech is one of the renowned companies in this industry to produce automotive wiring harnesses. This company can manufacture and deliver custom made wiring harnesses as per the specifications of the client.

Lets Cloom Suport Your Projects


Fill in your details and we’ll get back to you in 24 Hours.

Get a free wire harness or cable assembly sample?

Cookies help us deliver our services. By using our services, you agree to our use of cookies.


Fill in your details and we’ll get back to you in 24 Hours.