Car Wiper Lever Diagram

Introduction

The car wiper lever is a crucial component of a vehicle's electrical system, responsible for controlling the operation of the windshield wipers. Understanding the lever's diagram and function is essential for troubleshooting any malfunctions related to the wiper system.

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Diagram of a Car Wiper Lever

The typical car wiper lever comprises several key components:

1. Main Switch: This switch turns the wiper system on and off. It usually features three positions: "Off," "Intermittent," and "Continuous."

2. Intermittent Adjustment Knob: If the main switch is set to "Intermittent," this knob allows the driver to adjust the time interval between wiper cycles.

3. Wiper Speed Selector: This selector adjusts the speed of the wipers when the main switch is set to "Continuous." It typically has three settings: "Low," "Medium," and "High."

4. Mist Switch: Some wiper levers include a mist switch, which activates a single wipe cycle with a small amount of fluid.

5. Washer Fluid Activation Button: This button sprays washer fluid onto the windshield. It can be located on the lever or on the steering column.

How the Wiper Lever Works

When the main switch is turned to "Continuous," the lever sends an electrical signal to the wiper motor, which activates the wipers. The wiper speed selector adjusts the voltage supplied to the motor, determining the wiper's speed.

In "Intermittent" mode, the lever sends intermittent signals to the motor, causing the wipers to cycle at the interval set by the adjustment knob.

The mist switch activates a relay that opens the washer fluid valve, spraying fluid onto the windshield. The washer fluid button on the steering column also triggers this relay.

Troubleshooting Wiper Lever Issues

If the wipers are not operating correctly, the wiper lever may be the culprit. Here are some common issues:

1. Wiper Lever Not Turning On: Check the fuse box for a blown fuse related to the wiper system. If the fuse is intact, the lever may be faulty and require replacement.

2. Wiper Speed Irregular: A faulty speed selector or intermittent adjustment knob may cause irregular wiper speeds. Clean the contacts or replace the faulty component.

3. Mist Function Not Working: The mist switch or washer fluid valve may be defective. Inspect the valve and switch for any blockages or damage.

4. Washer Fluid Not Spraying: The washer fluid pump or reservoir may be malfunctioning. Check the fluid level and ensure the pump is working correctly.

Conclusion

Understanding the car wiper lever diagram and function is essential for diagnosing and repairing any issues related to the wiper system. By following these guidelines, you can ensure that your windshield wipers operate efficiently and keep your visibility clear while driving. Regular maintenance and inspection of the wiper lever can prevent problems and ensure the proper functioning of this vital component.