5r55s transmission is widely used in many American-made vehicles, such as Ford, Lincoln, and Mazda. It is a five-speed automatic transmission that provides smooth and effortless shifting. One of the key components in a 5r55s transmission system is the wiring harness, which connects various sensors, solenoids, and switches to the main computer or transmission control module (TCM).
What is a Wiring Harness?
A wiring harness is a bundle of wires and connectors that transmit electrical signals between different components in a system. In the case of a 5r55s transmission, the wiring harness connects the transmission sensors, solenoids, and switches to the TCM. The TCM, in turn, uses this information to control the shifting of the transmission, based on the driver’s input, engine load, speed, and other factors.
The wiring harness in a 5r55s transmission consists of multiple wires, each with a specific color and designated function. For example, the orange wire is for the torque converter clutch solenoid, the dark green wire is for the 2-3 shift solenoid, and so on. By following the wiring diagram, you can identify which wire goes to which component and troubleshoot any issues that may arise.
5r55s Transmission Wiring Harness Diagram
Here is a simplified wiring diagram for a 5r55s transmission:
| Wire Color | Function |
|---|---|
| Orange | Torque Converter Clutch Solenoid |
| Black/Light Green | Vehicle Speed Sensor (VSS) |
| Dark Blue/Light Green | Turbine Speed Sensor (TSS) |
| Dark Green/Light Green | 2-3 Shift Solenoid |
| Light Blue/Light Green | 3-4 Shift Solenoid |
| Red/Light Green | Line Pressure Control Solenoid |
| Yellow/Light Green | Coast Clutch Solenoid |
| White/Light Green | Intermediate Clutch Solenoid |
| Brown/Light Green | Overdrive Clutch Solenoid |
| Gray/Light Green | Transmission Range Sensor (TRS) |
Note that this is just a general overview of the wiring diagram for a 5r55s transmission. The actual diagram may differ depending on the year, make, and model of your vehicle. Always refer to the specific wiring diagram for your vehicle to ensure accuracy.
FAQs
1. What causes wiring harness problems in a 5r55s transmission?
There are several reasons why a wiring harness in a 5r55s transmission may malfunction. These include:
- Worn or corroded connectors
- Friction or chafing of wires against other components
- Exposure to heat, moisture, or chemicals
- Broken or damaged wires
- Improper installation or repair
2. How do I diagnose a wiring harness problem in a 5r55s transmission?
If you suspect a wiring harness problem in your 5r55s transmission, there are several steps you can take to diagnose the issue:
- Check the wiring harness for visible signs of damage, such as broken wires, corroded connectors, or frayed insulation.
- Use a multimeter to test the continuity of each wire in the harness. If any wire fails the continuity test, it may indicate a broken or damaged wire.
- Check the resistance of each solenoid and sensor that is connected to the wiring harness. If any solenoid or sensor is out of range, it may indicate a faulty component.
- Check the voltage and ground signals at each solenoid and sensor to ensure that they are within range. If any signal is missing or out of range, it may indicate a wiring issue or a faulty TCM.
3. How do I repair a wiring harness problem in a 5r55s transmission?
If you have identified a wiring harness problem in your 5r55s transmission, you can repair the issue by:
- Replacing any damaged or broken wires
- Cleaning or replacing corroded connectors
- Wrapping the wires with electrical tape or heat shrink tubing to protect them from friction or chafing
- Securing any loose or hanging wires with zip ties or brackets
- Reconnecting any disconnected or loose wires
4. Can I replace a 5r55s transmission wiring harness myself?
Replacing a wiring harness in a 5r55s transmission can be a complex and time-consuming process. It requires special tools and knowledge of electrical systems. If you are not familiar with transmission wiring or do not have the necessary tools, it is recommended that you seek the assistance of a professional mechanic or transmission specialist.
5. How much does it cost to replace a 5r55s transmission wiring harness?
The cost of replacing a wiring harness in a 5r55s transmission can vary depending on the make and model of your vehicle, as well as the extent of the damage. On average, you can expect to pay between $300 and $800 for parts and labor. However, this may be higher or lower depending on your specific circumstances.
By understanding the basics of a 5r55s transmission wiring harness diagram, you can troubleshoot and diagnose any issues that may arise. Always refer to the specific wiring diagram for your vehicle and seek the assistance of a professional if needed.
