Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Door Wiring Harness Group

The Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Door Wiring Harness Group is a vital component designed to ensure the efficient and reliable functioning of the door systems in Dongfeng’s robust tractor trucks. This wiring harness assembly integrates multiple critical elements, each serving a specific function to maintain vehicle performance and safety. Here’s an in-depth description of each component included in this comprehensive wiring harness group:

Product Parameters of Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Door Wiring Harness Group

Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Door Wiring Harness Group
LH Door Harness Assembly
The LH (Left-Hand) Door Harness Assembly is a central element of the wiring harness group, specifically tailored for the left side of the tractor truck. This assembly is meticulously engineered to handle various electrical connections within the driver’s side door, facilitating operations such as power windows, central locking, and signaling. It ensures that all electrical components within the LH door are properly connected and functional.
Protective Sleeve
A Protective Sleeve is used throughout the wiring harness group to shield the wiring from environmental damage, wear, and abrasion. This sleeve is crucial for maintaining the integrity of the electrical wires by preventing exposure to elements that could lead to deterioration or malfunction. The protective sleeve ensures longevity and reliability of the wiring harness in challenging operating conditions.
Binding Tape
Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Door Wiring Harness Group
Binding Tape plays an essential role in organizing and securing the wiring within the harness. It helps to bundle multiple wires together neatly, preventing them from tangling and ensuring a clean and orderly installation. This tape also contributes to the overall durability of the harness by offering additional protection against physical damage.
RH Door Harness Assembly
The RH (Right-Hand) Door Harness Assembly mirrors the LH assembly but is designed for the passenger side door. This harness facilitates similar functionalities on the right side, including power window control, door lock mechanisms, and signal operations. It ensures that all electrical components on the passenger side are interconnected and operate seamlessly.
Relay Assembly
Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Door Wiring Harness Group
The Relay Assembly included in the harness group is a critical component for controlling various electrical circuits. Relays act as switches that manage the flow of electrical current to different parts of the truck, such as the power windows and door locks. The relay assembly ensures that these components receive the correct electrical signals for proper operation.
Nut and Self-Tapping Screw
Nuts and Self-Tapping Screws are integral for the physical assembly and installation of the wiring harness. Nuts provide secure fastening for various connectors and components, while self-tapping screws are used to attach the harness to the truck’s structure. These hardware elements ensure that the wiring harness remains securely in place and functions effectively.
Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Door Wiring Harness Group
Detailed Component Connections
The Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Door Wiring Harness Group connects several critical components, each serving a specific function within the truck’s door system. Below is a detailed breakdown of these connections:
A-To LH Body Harness: This connection links the LH door harness assembly to the main body harness of the truck, integrating all door-related electrical functions with the vehicle’s primary electrical system.
B-To Power Window Switch at Passenger’s Side: This connection enables the control of the power window on the passenger’s side. It ensures that the window can be operated efficiently from the passenger seat.
C-To Power Window Switch at Driver’s Side: This connection facilitates control of the driver’s side power window. It allows the driver to adjust the window with ease, contributing to overall vehicle convenience.
Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Door Wiring Harness Group
D-To Central Control Lock Time Switch: This connection is responsible for the central locking system’s time control. It manages the timing of the central locking mechanism, ensuring doors lock and unlock as needed.
E-To LH Power Window Motor: This connection links to the power window motor on the left-hand side. It transmits the electrical signals necessary for the operation of the motor, enabling smooth movement of the window.
F-To LH Side Turn Signal Lamp: This connection controls the left-hand side turn signal lamp. It ensures that the turn signals function correctly, enhancing the vehicle’s safety and signaling capabilities.
G-To Relay: This connection is linked to one of the relays in the assembly. It helps in managing the electrical current for various door functions.
H-To Relay: Another connection to a relay, ensuring additional control over the electrical systems related to the door harness.
Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Door Wiring Harness Group
I-To Step Lamp: This connection provides power to the step lamp, which illuminates the step area for easier entry and exit from the truck.
J-To Power Window Switch: This connection allows control of the power windows from the central switch, making it convenient for both the driver and passengers.
K-To Central Door Lock Actuator: This connection is vital for the central door lock actuator, which manages the locking and unlocking of all doors from a single point.
L-To Power Window Motor: This link to the power window motor on the right side ensures that the window operates smoothly and efficiently.
M-To Side Turn Signal Lamp: This connection controls the right-hand side turn signal lamp, complementing the LH side and ensuring proper signaling.
Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Door Wiring Harness Group
N-To Relay: This connection is linked to another relay, contributing to the overall control and management of electrical functions within the door harness.
O-To Relay: A further connection to a relay, ensuring robust and reliable operation of the electrical systems.
P-To Step Lamp: This connection powers the step lamp on the opposite side, ensuring consistent illumination for safe entry and exit.
Q-To Body Harness: This final connection links the door harness to the main body harness, completing the integration of the door’s electrical systems with the truck’s overall wiring network.
Conclusion
The Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Door Wiring Harness Group is an essential assembly that ensures the reliable operation of the tractor truck’s door systems. By integrating various components such as harness assemblies, protective sleeves, relays, and hardware, this wiring harness group facilitates the efficient functioning of critical door-related features. Each connection and component is meticulously designed to enhance the vehicle’s performance, safety, and user convenience, reflecting Dongfeng’s commitment to quality and innovation in their tractor trucks.

Serial No.	Part No.	Part Name	Qty.
1	10081400	LH door harness assembly	1
	10372000	Protective sleeve	3
	10085100	Binding tape	10
2	10370000	RH door harness assembly	1
	10372000	Protective sleeve	3
	10085100	Binding tape	11
	10086900	Relay assembly	4
	RQ39705	Nut	4
	RQ2710512	Self tapping screw	4

		A-To LH body harness
		B-To Power window switch at passenger’s side
		C-To Power window switch at driver’s side
		D-To Central control lock time switch
		E-To LH power window motor
		F-To LH side turn signal lamp
		G-To Relay
		H-To Relay
		I-To Step lamp
		J-To Power window switch
		K-To Central door lock actuator
		L-To Power window motor
		M-To Side turn signal lamp
		N-To Relay
		O-To Relay
		P-To Step lamp
		Q-To Body harness