Ford Transit Mk8 Rear Tail Light Lamp Left N/S Harness Wire Loom BK31-13405-AG

Ford Transit Mk8 Rear Tail Light Lamp Left N/S Harness Wire Loom is an original electrical installation component designed for installation in the rear left section of the vehicle body. It enables the correct connection of factory electrical receivers in this area of the vehicle, ensuring stable power supply and control signals. By maintaining the factory geometry and connectors, the harness allows for the precise restoration of the original installation routing in the Ford Transit Mk8.

Specifications and technical data

• SKU: BK31-13405-AG-2
• Mark: Ford
• Condition: Used
• OEM Part Number: BK31-13405-AG
• Substitutable numbers: BK31-13405-AG, BK3113405AG, 1870426
• Location on the vehicle: Rear, Left
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and vehicle placement

The presented wire harness is dedicated for installation in the rear left section of the Ford Transit Mk8. It covers the body area where electrical components such as lighting, sensors, or additional factory-fitted modules are located. The design of the harness is matched to the factory mounting points, which facilitates routing the wires along the original paths and minimizes the risk of abrasion or mechanical damage.

Technical and functional characteristics

The harness has been designed as an OEM installation component, which means compliance with Ford's factory standards regarding wire cross-sections, insulation, and connector types. The wires used are selected for current-carrying capacity and resistance to conditions in the rear of the body, including temperature changes and humidity. The connectors are prepared for compatibility with the vehicle's original sockets, allowing for installation without the need to modify the wiring.

By maintaining the factory pin configuration and branching, the harness supports the correct operation of electrical systems in this part of the vehicle, reducing the risk of diagnostic errors and communication problems between modules. This solution is particularly beneficial for post-accident repairs or restoring the vehicle to full functionality after damage to the installation.

Benefits of using an original harness

Using the original rear left wire harness in the Ford Transit Mk8 allows for maintaining the consistency of the entire vehicle electrical system. Compared to universal or custom-made solutions, the factory harness provides:

• a secure fit of wire lengths and branches to the specific body version,
• compatibility with factory connectors and mounting brackets,
• reduced risk of failures resulting from improper soldering or crimping of wires,
• easier diagnostics in the future, thanks to the preservation of the original installation layout.

This solution is particularly recommended for vehicles in intensive use, where the stability of the power supply for lighting and rear body equipment has a direct impact on safety and comfort of use.

Component condition and service application

The offered wire harness comes from dismantling and is intended for service applications in Ford Transit Mk8 vehicles where the original installation in the rear left section has been damaged. Choosing a used OEM component allows for maintaining high installation compatibility while optimizing repair costs. It is a practical solution both for workshops specializing in fleet maintenance and for individual users who care about the proper functioning of the electrical system.

If you are planning a comprehensive repair or upgrade of the rear electrical installation zone in your Ford and need other components from the same group, such as additional harnesses, connectors, or modules mounted within the body, check the available parts in the Other Ford category.

Part selection and technical knowledge

When selecting electrical installation components for modern vehicles, it is worth using reliable sources of information and verified catalog numbers. Technical materials describing the differences between individual equipment versions, as well as practical tips on working with original harnesses and modules, can be helpful. In the context of comparing factory solutions and selecting the right components, it is worth reading the article on our blog Audi RS vs other models – what is hidden under the hood and chassis?, which shows how important properly selected components are in vehicles with different levels of equipment.