Universal Wiper Switch Wiring Diagram

When it comes to restoring classic cars, one of the most important components to check is the wiper switch. A faulty wiper switch can cause many problems, such as not working properly or even shorting out the electrical system. In this article, we will discuss how to wire a universal wiper switch to ensure proper functionality and safety while on the road.

Understanding the Wiper Switch

The wiper switch is an electrical component that controls the windshield wiper motor. It is located on the dashboard and usually has three positions: off, low, and high. The switch is connected to the wiper motor through a wiring harness that needs to be properly installed to ensure proper function.

The wiper switch also has a built-in mechanism that allows it to regulate the speed of the wiper blades. This mechanism is usually controlled by a resistor that can be found either inside or outside the wiper motor assembly.

Tools and Materials Required

Before beginning the wiring process, it is important to gather all necessary tools and materials. Here is a list of everything needed to wire a universal wiper switch:

Tools Materials
Screwdriver Wiring harness
Wire cutters Fuse holder and fuse
Wire strippers Battery cable
Crimping tool Heat shrink tubing
Electrical tape

Wiring the Universal Wiper Switch

The universal wiper switch is designed to work with any type of vehicle, regardless of the model and year. It is a simple and straightforward device that can be easily installed by following these steps:

Step 1: Disconnect the Battery

Before beginning any wiring work, always make sure to disconnect the battery to avoid any electrical shorts or other hazards. Use a wrench to loosen the negative terminal and remove it from the battery.

Step 2: Locate the Wiper Motor

The wiper motor is usually located on the firewall or under the cowl panel. It should be easily accessible once the hood is opened. Check the manufacturer’s instructions to make sure you have located the motor correctly.

Step 3: Attach the Wiring Harness

Attach the wiring harness to the wiper motor by connecting the white wire to the ground, the red wire to the positive, and the black wire to the motor. The wiring harness should also have an extra wire, which is usually orange or yellow. This wire needs to be connected to the wiper switch.

Step 4: Install the Fuse Holder

The fuse holder should be installed between the battery and the wiper switch. Use a crimping tool to attach the fuse holder to the battery cable, and then wrap it with electrical tape for added protection.

Step 5: Install the Wiper Switch

Mount the wiper switch onto the dashboard using screws or clips. Connect the extra wire from the wiring harness to the appropriate terminal on the switch.

Step 6: Connect the Battery

Reconnect the battery by sliding the negative terminal onto the battery and tightening it with a wrench. Make sure all connections are secure and tight before starting the vehicle.

FAQs about Universal Wiper Switch Wiring Diagram

What if the Wiper Switch Doesn’t Work?

If the wiper switch doesn’t work after installation, check the wiring connections to ensure a proper fit. Also, check the fuse holder to make sure the fuse has not blown. If the issue persists, it is recommended to seek the help of a professional mechanic.

What if I Have a Different Type of Vehicle?

The wiring process for a different type of vehicle may differ slightly depending on the model and year. Always check the manufacturer’s instructions or consult with a professional mechanic before beginning any wiring work.

Can the Wiper Switch Be Installed Without a Wiring Harness?

It is not recommended to install the wiper switch without a wiring harness as it can cause electrical shorts and other safety hazards.

Is It Safe to DIY the Wiring Process?

If you are familiar with basic automotive electrical systems, then it is safe to DIY the wiring process. However, if you are not comfortable or experienced with this type of work, it is recommended to seek the help of a professional mechanic.

How Do I Test the Wiper Switch?

Testing the wiper switch is simple. With the engine running, turn on the wiper switch and test each position (off, low, high) to ensure proper functionality. If the wipers do not work, check the wiring connections and the fuse holder to determine the cause of the issue.

Conclusion

Wiring a universal wiper switch is a necessary step when restoring classic cars. By following these simple steps and using the correct tools and materials, you can ensure proper functionality and safety on the road. As always, it is recommended to seek the help of a professional mechanic if you are not comfortable with this type of work.