Windshield Wiper Switch Wiring Diagram

1. Introduction

Windshield wipers are an essential component of any vehicle, helping to ensure clear visibility during inclement weather. The windshield wiper switch controls the operation of the wipers, allowing the driver to adjust the speed and intermittent operation of the wipers. This article provides a detailed wiring diagram for a typical windshield wiper switch, explaining the function of each wire and terminal.

2. Wiring Diagram

The following wiring diagram represents a common windshield wiper switch configuration:

Diagram 1: Windshield Wiper Switch Wiring Diagram

3. Terminal Functions

Terminal 1 (Power): This terminal receives power from the vehicle's electrical system when the ignition is turned on.

Terminal 2 (Ground): This terminal connects to the vehicle's ground system, providing a return path for electrical current.

Terminal 3 (Low Speed): This terminal activates the windshield wipers at low speed when connected to Terminal 1.

Terminal 4 (High Speed): This terminal activates the windshield wipers at high speed when connected to Terminal 1.

Terminal 5 (Intermittent): This terminal allows the driver to set the wipers to operate intermittently. When connected to Terminal 1, it activates a timer that turns the wipers on and off at regular intervals.

Terminal 6 (Park): This terminal moves the wiper blades to the "park" position when connected to Terminal 1.

Terminal 7 (Spray): This terminal (if present) activates the windshield washer fluid sprayers when connected to Terminal 1.

4. Wire Colors

The wire colors used in the wiring diagram may vary depending on the vehicle make and model. However, common wire colors include:

Power Wire: Red or Orange

Ground Wire: Black or Brown

Low Speed Wire: Green or Yellow

High Speed Wire: Blue or White

Intermittent Wire: Purple or Gray

Park Wire: Pink or Light Blue

Spray Wire: Green with Black Stripe

5. Troubleshooting

If the windshield wipers are not working properly, the wiring diagram can assist in troubleshooting the issue:

No Power: Check that the power wire is connected securely to Terminal 1 and that there is voltage present at this terminal.

No Ground: Check that the ground wire is connected securely to Terminal 2.

Wipers Not Operating at Low Speed: Check the connection between Terminal 3 and Terminal 1, as well as the low speed wire.

Wipers Not Operating at High Speed: Check the connection between Terminal 4 and Terminal 1, as well as the high speed wire.

Intermittent Function Not Working: Check the connection between Terminal 5 and Terminal 1, as well as the intermittent wire.

Wipers Not Parking Correctly: Check the connection between Terminal 6 and Terminal 1, as well as the park wire.

Washer Sprayers Not Operating: Check the connection between Terminal 7 and Terminal 1 (if present), as well as the spray wire.

6. Conclusion

Understanding the wiring diagram for a windshield wiper switch is essential for troubleshooting and repairing any issues with the wiper system. By following the connections and identifying the function of each wire, technicians can quickly diagnose and correct any problems, ensuring that the vehicle's wipers are operating effectively and providing clear visibility during inclement weather.