Car Engine Wire Harnesses, Custom Assembly Service

If you are an engine modification shop that modifies or upgrades engines and related parts, you will definitely use engine wiring harnesses. The wiring harness is an essential part of the engine, just like how the brain is an essential part of the human body. If the engine is the brain of a car, then the engine wiring harness is the brain's nerves, connecting the car's various electrical components, such as sensors, the chassis, the central control system, and so on.

What is a Car Engine Wire Harness?

A car engine wire harness is a collection of wires, connectors, and terminals that transmit electrical power and signals throughout the vehicle. It’s essentially the central nervous system of your car, linking various electrical components to ensure they work together seamlessly.

Components of an Engine Wire Harness

• Wire and Cable
• Connector and Terminal
• Covering Accessories

Wire and Cable

The wires and cables, often made from copper or aluminum, are at the heart of a wire harness and insulated with durable materials to prevent damage. Connectors play a crucial role, in ensuring that each wire is securely connected to the right component. Terminals, typically metal ends of the wires, fit into these connectors. Finally, protective coverings like sleeves and tapes safeguard the wires from heat, moisture, and physical wear and tear.

When we provide a quote, we always ensure that the wire chosen by the customer is heat-resistant. If they missed this point, we usually inquire about their reasons as there may be other factors to consider. It's possible that they overlooked this aspect due to the high temperatures generated by the engine during operation. Although modern engine designs utilize cylinder bodies made of materials with excellent thermal insulation, preventing surrounding components from failing due to high temperatures, it remains the primary source of heat generation in the entire car. Therefore, using heat-resistant wire is preferable to ordinary wire. Consequently, we typically recommend utilizing UL3266 specification wire – which is also frequently used by us – as it allows for cost reduction in production.

Connector and Terminal

The choice of connector for the engine wiring harness is a matter of personal preference. Each engine manufacturer has the freedom to select their preferred type of connector, taking into account the number of pins in the interface. For instance, the ignition wire typically necessitates two wires, thus requiring a 2-pin connector. Conversely, the fuel pump demands four wires and therefore requires a 4-pin connector. Similarly, sensors usually require three wires and consequently need a 3-pin connector. The tolerance for temperature and pressure in connectors generally exceeds that of wires; hence, as long as the wires meet requirements, considerations regarding voltage and temperature resistance in connectors are unnecessary.

Covering Accessories

The engine wiring harness covering material, we usually choose is also high-temperature resistant material, the theme part of the use of corrugated tube cladding, if the temperature is particularly high, will choose fiberglass soft tube, which usually can withstand at least 200 ° C high temperature, and some can reach 600 ° C.

Engine wire Harness types

There are different types of engine wiring harnesses, mainly because of the different types of functions designed by each engine manufacturer. For the same 4-cylinder engine, Ford's engine and Toyota's engine require different engine wiring harnesses. The engine wiring harnesses of each Ford model will also customize unique engines according to specific models. Because each model uses a different engine, there is no universal harness that can be used on all models.

How much are engine wiring harnesses cost?

From the above explanation, you know that engine wire harnesses are unique harnesses, every model vehicle has a unique wire harness, and also the engine wire harnesses consist of multiple components, if you only need to service a specific part, we support custom this part. Engine wire harness prices are based on all components used and processing costs, different connectors, terminals, wire, and covering materials used, price will be different, We offer complete harnesses that vary widely in price, ranging from $100 to over $500. Additionally, we customize ECU wire harnesses, the pricing also depends on how complex it is and what raw materials it chooses.

If I tell you the vehicle model and age, can you make it?

No, we do custom business, only when you send wire harness details, we confirm whether we make it, you can send a sample or wire harness drawing to us to check if we can make it.

We only need one or two sets, can you make it?

We specialize in B2B Wire Harness Manufacturing because wire harness products are specifically designed for integration into larger systems or devices. They are not typically sold directly to end consumers as they require customization and assembly to meet the specific requirements of a particular device or application.

Moreover, producing only one or several units of custom wire harnesses is not an economically viable option due to the significant upfront costs involved in tooling setup and production processes. By serving businesses rather than individual consumers, we can achieve economies of scale by producing larger quantities at competitive prices while maintaining superior quality standards.

If you do only need just one, we recommend you search at Amazon, AutoZone, CarParts, etc. to check if you can find exactly the same as you needs.

How to customize the engine wire harness?

Send us your sample or drawing/schematic for quote price→ Feedback with quotation(1~3 days) → Confirm quotation → Arrange sample you for approval→ [Make mold if needed (7 days) →Mold test] → Making samples(1~3 days)→Samples test(Approval) →place order for Mass production(2~3 weeks)→Quality checking→Packing →Delivery →After Service →Repeat Order.