Do you need Custom wire harnesses in bulk? We can help you to offer premium quality Custom wire harnesses in bulk with great services. There are many 定制线束 available. You just tell us the size, type, and shape you want. We will send you a quote quickly so you don’t have to wait. Once you agree, we will start the job right away. We use good tools and strong parts to build each harness. Our wires work for cars, machines, and many other things. We also test each one to make sure it works well. You get safe and strong cables made just for your job. No stress, just fast and straightforward service.

At QL-Custom Technology Ltd., we ensure every 定制线束 fits your needs, is easy to install, and works well every time. You won’t have to worry about delays, confusion, or poor quality. We make sure your work gets done faster, and you save time, effort, and cost with every bulk order.

Why Buy Harnesses in Bulk?

When you order a lot of harnesses at once, you save money and time. Buying in bulk is one of the best ways to get good parts at a low cost. It also helps you avoid running out or reordering again and again. QL-Custom is one of the top 定制线束 manufacturers, and we give you more value with every order:

• We build fast, even for huge orders
• Each unit costs less when you order more
• Every item is tested before it leaves our factory
• We pack and ship everything quickly and safely

We work with all kinds of people. Big companies. Small shops. Car builders. Tech teams. Even DIY users. Whatever your work is, we can help. You tell us what you need. We help you get it done.

Fast Quotes and Fast Builds

We don’t waste your time with long forms or slow replies. Just send your idea, your photo, or your sample. We will look into it right away and send you a precise quote. If you want Custom wire harnesses from us, we get to work. Our team starts your order fast. You get updates on the way. Most custom cables harnesses are done in just a few short days.

We help you make the plan if you need any help on your design. We help you design the perfect match. From idea to finished harness, we are here to guide every step.

ECU turning wire harness

(Control Your Car the Right Way)

Our ECU tuning wire harness gives you better control of your engine. It helps your car perform better and faster. The ECU is the brain of your vehicle, and this harness helps that brain talk to all the other parts clearly. If you want:

Best for:

• Faster speed
• Cleaner engine sounds
• More engine power

This harness is the right one for you. It works great for:

• Racing vehicles
• Tuned or modified cars
• Custom performance builds

And if you need a special type, we also make custom engine harness kits just for your car’s shape and setup.

Automotive sensor harness

(Power and Data for Every Sensor)

Cars today use many different sensors. These sensors check speed, temperature, air, fuel, and more. Our automotive sensor harness helps all these sensors work together by giving them the right power and clean data paths. This harness makes your car smarter and safer to drive.

Best for use with:

• Speed sensors to track how fast you go
• Temperature sensors for engine and air
• Oxygen sensors for fuel control

It fits with almost any car wiring kit. Each wire is labeled, and each plug fits the correct part. It is simple to install, even for beginners.

Truck tuning harness

(Strong Wires for Heavy Trucks)

Trucks carry big loads and drive long distances. They need strong wires that last. Our truck tuning harness is built to handle hot weather, rough roads, and heavy work. It helps keep the engine tuned and the power steady.

This harness is excellent for:

• Farm trucks and work vehicles
• Long-haul trailers and haulers
• Off-road and construction trucks

It helps you control fuel, engine response, and more. We build it to match your truck size and setup. It’s built to last and built to work.

Oil gas sensor wire harness

(Built for Dirt, Water, and Heat)

Tough jobs need tools that work in hot, wet, and dirty places. Our oil gas sensor wire harness is made for just that. It is strong, safe, and built to last in the worst weather or work spots.

We use:

• Sealed ends to stop dust and water
• Wraps that stand up to heat
• Thick wires for more strength

Use it in:

• Drilling machines
• Oil rigs
• Field tools and more

It works all day, every day. No matter how hard the job is.

Popular Custom wire harness Types

Know Which Harness Is Right for You

• Want more control over your car’s engine?

ECU Tuning Harness

• Have lots of sensors in your vehicle?

汽车传感器线束

• Work with big trucks?

卡车调谐线束

• Work in oil, gas, or mines?

Oil & Gas Sensor Harness

Pick the one that fits your job best. Then let us know. We’ll build it for you.

Why Pick QL-Custom Technology Ltd.

We are trusted 定制线束 manufacturers with years of real-world experience. We know how to build parts that work well and last long. We don’t just sell. We help you at every step. 

Here’s what you get with us:

• Harnesses made just for your needs
• OEM or custom parts, make your way
• Fast test samples before the complete build
• Low costs and fast shipping

We help with cars, trucks, robots, tools, and machines. Visit to see how we can help you today.

If you need smart, safe, and strong custom wiring, QL-Custom is here to help. We are expert car wire harness manufacturers and reliable cable harness suppliers. We build fast, test every item, and ship on time.

Let’s get started. Fill out our quick quote form. Tell us what you need. We’ll take care of the rest from start to finish, built just for you.

常见问题

• What makes your car harnesses better than others on the market?

Our car harnesses use tough and strong wires, carefully done joints, and innovative wire paths that help power move without trouble. Each harness goes through complete testing before it leaves our place, so you can trust it will work right and last long.

• Can I order the same wire harness again later?

Yes. We keep your order files safe. You can ask us to make the same again without delays or changes.

• Do your wire harnesses work well in very hot or very cold places?

Yes, our wire harnesses are made to handle heat, cold, wet weather, or dry dust. Whether winter or summer, they stay strong and do not break or crack easily.

• Can your harnesses be used in many types of cars?

Yes. We design our harnesses to fit many different cars—including very new cars, old cars, special models, and even custom-built ones. Just tell us what you need.

• Can you make special wire harnesses for classic or old model cars?

Yes, we can. We look at the old wire styles, colors, and lengths, then match them as close as possible. That way, the wires still look like they belong in the car but work like brand-new ones.

人们还会问

What happens if a wire inside a car stops working correctly?

If a wire goes bad, some car parts may stop working. It could be the lights, the radio, or other things like the car screen or sensors.

Why do your wires last longer than most others?

We use thick, strong wires and top-grade parts. They are built to stay tough and not wear out for long.

Are your wire harnesses safe in case of fire or high heat?

Yes. We use wraps that slow down heat and fire. This adds safety for you and your car.

Can your wires bend without breaking or cracking?

Yes. Our wires are made to bend around corners and stay strong. They do not break, even after many bends or moves.

Can your wires stay safe near hot engine parts?

Yes. The wraps we use do not melt or burn. They can be near engines or hot parts without danger.

Do your wires come in many different color choices?

Yes. We offer many color options—bright, plain, and custom colors. Colors help with easy wire tracking.

Can your harnesses work with screens, cameras, and other smart car parts?

Yes. We build special harnesses that work well with new tech like touch screens, backup cameras, and sensors.

How will I know what kind of Custom wire harness my car needs?

Just tell us the car model and what parts you want to power. We will help you pick the right one.

Can good wires help my car save fuel and run better?

Yes. When wires work well, car parts do not use extra power. This can help the car use less fuel over time.

Do you test the wires before you send them to buyers?

Yes. Every wire and harness goes through complete tests to check flow and safety. We make sure all are ready to use.

Custom wire harness and Diagram