Ford S-Max Mk1 Rear Tail Light Lamp Wiring Cable Outer Right O/S AM21-13404-AG

Ford S-Max Mk1 Rear Tail Light Lamp Wiring Cable Outer Right O/S is an original electrical system component designed to support the right, outer tail light in this model. Thanks to its factory-fit design for the Ford body and electrical system, it ensures a stable connection for lighting signals and reduces the risk of malfunctions resulting from improper installation. It is a practical solution when replacing a damaged wiring harness or performing repairs on the rear lighting system.

Specifications and technical data

• SKU: AM21-13404-AG-2
• Mark: Ford
• Condition: Used
• OEM Part Number: AM21-13404-AG
• Substitutable numbers: AM21-13404-AG, AM2113404AG, 1712784
• Location on the vehicle: Rear, Right
• Part type: Wire Harness
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the vehicle

The presented wiring harness is part of the Wires, harnesses, and connectors category, responsible for transmitting power and control signals to the right, outer tail light. Its placement in the rear area of the vehicle on the right side allows for direct connection to the factory installation point, without the need for modifications or adaptations of other solutions.

Properly routed wires and matched connectors help maintain the correct operation of functions such as position lights, brake lights, turn signals, or reversing lights – depending on the lamp configuration used in a given Ford S-Max Mk1 unit.

Construction and fitment for Ford S-Max Mk1

The wiring harness has been designed specifically for the first-generation Ford S-Max, which translates into the correct wire length, placement of mounting points, and compatibility with tail light connectors. As a result, installation is orderly, and the wires can be routed according to factory paths, which limits the risk of chafing and mechanical damage.

The original Ford solution allows for maintaining the consistency of the vehicle's electrical system, and the connectors used are prepared for operation in conditions of high humidity and variable temperatures, typical for the rear part of the body. This promotes reliable electrical contact and stable lighting performance in the long term.

Condition, service application, and benefits of installation

The item is offered in used condition, making it a reasonable choice for maintenance repairs when it is necessary to replace a damaged or corroded wiring harness. In many cases, this allows for restoring full functionality of the rear lighting without the need to interfere with the vehicle's main wiring.

In practice, installing this wiring harness is particularly useful when problems occur such as:

• loss of individual tail light functions on the right side,
• intermittent light operation caused by wire damage,
• signs of overheating or corrosion within the lamp connectors.

Replacing the complete wiring harness in such a case is often faster and more predictable than point-to-point wire repairs, while simultaneously allowing the factory character of the installation to be maintained.

Integration with the electrical system and safety

As an original Ford component, the wiring harness is prepared to work with the vehicle's factory electrical protections. When properly installed, it does not require additional modifications to the fuse box or the main body harness, which minimizes the risk of installation errors.

Using a dedicated wiring harness for a specific model and side of the vehicle helps maintain the correct electrical parameters of the lighting circuit, which is important both for driving safety and for proper interaction with the vehicle's diagnostic systems.

If you are planning a comprehensive repair or upgrade of the rear lighting zone in your Ford and need other elements from the same group, such as additional harnesses, wire sections, or lamp connectors, check the available parts in the Ford wires, harnesses, and connectors category.

If you want to expand your knowledge about the cost-effectiveness of using original used components instead of new replacements, it is worth reading the article on choosing a used OEM air conditioning compressor as an alternative to new parts, which discusses the practical aspects of such a service approach.