The 4L80E is a popular automatic transmission used on heavy-duty vehicles such as trucks and vans. When installing or repairing a 4L80E transmission, it is important to have a proper wiring harness diagram to ensure consistent performance. In this article, we will discuss the external wiring harness diagram for the 4L80E transmission.
What is an External Wiring Harness?
The external wiring harness for the 4L80E transmission is a set of wires that connect the transmission to the vehicle’s electrical system. It includes wires for the transmission solenoids, speed sensor, pressure sensor, and other sensors and switches that are used to control the transmission’s operation.
The external wiring harness is connected to the transmission through a connector located on the side of the transmission case. This connector allows the wiring harness to be easily removed or replaced if necessary.
4L80E External Wiring Harness Diagram
The 4L80E external wiring harness diagram is a very useful tool when working on the transmission. It provides a visual representation of the wiring harness and helps to identify the different wires and their functions.
| Wire Color | Function |
|---|---|
| Pink | Transmission Range Switch Signal “A” |
| Light Green/Black | Transmission Range Switch Signal “B” |
| Dark Blue | Transmission Pressure Control Solenoid Signal |
| Light Blue | Transmission Pressure Switch Signal |
| Orange | Torque Converter Clutch Solenoid Signal |
| White | Transmission Fluid Temperature Sensor Signal |
| Green/White | Park/Neutral Position Switch Signal |
| Black/White | Ground |
| Red/White | Ignition Power Source |
It is important to note that the wire colors and functions may vary depending on the year, make, and model of the vehicle. It is always best to consult the vehicle’s service manual or wiring diagram to ensure proper identification of the wires.
Frequently Asked Questions
What is the purpose of the external wiring harness?
The external wiring harness connects the transmission to the vehicle’s electrical system and provides the necessary signals and power to control the transmission’s operation.
Where is the external wiring harness located?
The external wiring harness is connected to a connector located on the side of the 4L80E transmission case.
Why is the external wiring harness diagram important?
The external wiring harness diagram is important because it provides a visual representation of the wiring harness and helps to identify the different wires and their functions. This is important when working on the transmission to ensure proper installation and consistent performance.
Can the external wiring harness be repaired or replaced?
Yes, the external wiring harness can be repaired or replaced if necessary. It is important to use the correct wiring harness and follow proper installation procedures to ensure proper operation of the transmission.
What should I do if I am unsure about the wiring harness connections?
If you are unsure about the wiring harness connections, it is always best to consult the vehicle’s service manual or wiring diagram. It is important to properly identify the wires and their functions to ensure proper installation and consistent performance.
In conclusion, the 4L80E external wiring harness diagram is an important tool when working on the transmission. It provides a visual representation of the wiring harness and helps to identify the different wires and their functions. It is important to consult the vehicle’s service manual or wiring diagram to ensure proper installation and consistent performance.
