The 46RH transmission is a four-speed automatic transmission that was used in Dodge trucks and vans. It was introduced in 1990 and was used until 1997 when it was replaced by the 46RE transmission. This article will discuss the wiring diagram for the 46RH transmission and provide helpful information on how to troubleshoot and repair common wiring problems.
What is a Wiring Diagram?
A wiring diagram is a visual representation of the electrical connections and wiring for a specific system or piece of equipment. In the case of the 46RH transmission, the wiring diagram shows the electrical connections for the transmission controller, solenoids, sensors, and switches.
Wiring diagrams are important because they allow technicians and mechanics to understand how a system is wired and how the electrical components interact with each other. They are useful for troubleshooting problems, identifying faulty components, and repairing wiring issues.
Understanding the 46RH Transmission Wiring Diagram
The wiring diagram for the 46RH transmission is a complex diagram that includes many different electrical components and connections. Some of the key components shown on the wiring diagram include:
- Transmission controller
- Solenoids
- Sensors
- Switches
- Connectors
Each of these components is connected to the transmission in a specific way and plays a critical role in the operation of the transmission. Understanding how these components work together is essential for troubleshooting and repairing wiring issues.
Transmission Controller
The transmission controller is the brain of the transmission and is responsible for controlling the solenoids, sensors, and switches that operate the transmission. It receives input from various sensors and uses that information to determine when to shift gears and how much pressure to apply to the clutches and bands.
The wiring diagram shows the various connections for the transmission controller, including power, ground, and communication with the engine control module (ECM) and other systems.
Solenoids
The solenoids in the 46RH transmission are responsible for controlling the flow of hydraulic fluid to the clutches and bands that operate the transmission. There are several solenoids in the transmission, each with a specific function.
The wiring diagram shows the connections for each solenoid, including power, ground, and signal wires. It also shows the various electrical connectors that are used to connect the solenoids to the transmission controller.
Sensors
The sensors in the 46RH transmission are used to provide input to the transmission controller. They include the speed sensor, temperature sensor, pressure sensor, and throttle position sensor.
The wiring diagram shows the connections for each sensor, including power, ground, and signal wires. It also shows the various electrical connectors that are used to connect the sensors to the transmission controller.
Switches
The switches in the 46RH transmission are used to provide input to the transmission controller. They include the neutral safety switch, overdrive switch, and kickdown switch.
The wiring diagram shows the connections for each switch, including power, ground, and signal wires. It also shows the various electrical connectors that are used to connect the switches to the transmission controller.
Connectors
The electrical connectors in the 46RH transmission are used to connect the various components together. There are several different types of connectors used in the transmission, including weatherproof connectors, blade connectors, and Deutsch connectors.
The wiring diagram shows the location and type of each connector, as well as the wires that are connected to each connector.
Common Wiring Problems
Despite being a complex system, the wiring in the 46RH transmission is relatively reliable. However, there are a few common wiring problems that can occur.
One of the most common wiring problems is a broken wire. This can occur anywhere in the wiring harness and can be difficult to locate. Symptoms of a broken wire include erratic shifting, transmission slipping, or complete transmission failure.
Another common wiring problem is a corroded connector. This can cause poor electrical contact between the components and can result in erratic operation or transmission failure.
FAQ
What is the difference between the 46RH and 46RE transmissions?
The 46RH and 46RE transmissions are very similar, but the 46RE has an electronic overdrive section while the 46RH has a hydraulic overdrive section.
Can I use a wiring diagram for a different transmission?
No, the wiring diagram for the 46RH transmission is specific to that transmission and cannot be used for other transmissions.
How do I troubleshoot a wiring problem in the transmission?
The first step in troubleshooting a wiring problem is to inspect all of the wiring and connectors for damage or corrosion. If no problems are found, the next step is to use a multimeter or other electrical testing equipment to test the continuity and voltage of each wire.
Can I repair a broken wire in the transmission?
Yes, a broken wire can be repaired by splicing in a new section of wire. It is important to use the proper wire and connector to ensure a reliable repair.
Conclusion
The wiring diagram for the 46RH transmission is a complex diagram that includes many different electrical components and connections. Understanding how these components work together is essential for troubleshooting and repairing wiring issues. While wiring problems are relatively rare in the 46RH transmission, they can be difficult to diagnose and repair. By following the information provided in this article, you can improve your understanding of the wiring diagram and be better equipped to diagnose and repair any wiring issues that may arise.
