How to Diagnose and Solve B1439 Wiper Mode Select Switch Circuit Open Issues

Introduction

As a car owner, you may have experienced issues with your wiper mode select switch circuit. One of the most common issues is the B1439 error code, which indicates an open circuit in the wiper mode select switch. This can be frustrating, especially during rainy seasons. However, with the right knowledge and tools, you can diagnose and solve this issue on your own. In this article, we will guide you through the process of diagnosing and solving B1439 wiper mode select switch circuit open issues.

What is B1439 Wiper Mode Select Switch Circuit Open Issue?

The wiper mode select switch is responsible for controlling the wiper speed and mode. When the switch is faulty, it can cause the wipers to malfunction or stop working altogether. The B1439 error code indicates an open circuit in the wiper mode select switch. This means that the switch is not making a connection, and the wiper system cannot function properly.

Diagnosing B1439 Wiper Mode Select Switch Circuit Open Issue

To diagnose the B1439 error code, you will need a scan tool that can read the codes from your car’s computer. Follow these steps to diagnose the issue:

Step 1: Connect the Scan Tool

Connect the scan tool to your car’s OBD-II port, which is usually located under the dashboard on the driver’s side.

Step 2: Read the Codes

Read the codes from your car’s computer using the scan tool. Look for the B1439 error code, which indicates an open circuit in the wiper mode select switch.

Step 3: Inspect the Wiper Mode Select Switch

Inspect the wiper mode select switch for any signs of damage or wear. Check the wiring and connections for any loose or corroded connections.

Step 4: Test the Wiper Mode Select Switch

Test the wiper mode select switch using a multimeter. Set the multimeter to the continuity mode and test the switch for continuity. If the switch does not have continuity, it is faulty and needs to be replaced.

Solving B1439 Wiper Mode Select Switch Circuit Open Issue

Once you have diagnosed the B1439 error code, you can proceed to solve the issue. Follow these steps to solve the issue:

Step 1: Replace the Wiper Mode Select Switch

If the wiper mode select switch is faulty, replace it with a new one. You can purchase a new switch from your local auto parts store or online.

Step 2: Test the Wiper System

Test the wiper system to ensure that it is functioning properly. Turn on the wipers and test all the modes and speeds to ensure that they are working correctly.

Step 3: Clear the Error Code

Clear the B1439 error code from your car’s computer using the scan tool. This will ensure that the error code does not reappear.

Conclusion

Diagnosing and solving B1439 wiper mode select switch circuit open issues can be a simple process if you have the right knowledge and tools. By following the steps outlined in this article, you can diagnose and solve the issue on your own. Remember to always test the wiper system after replacing the switch to ensure that it is functioning correctly.

FAQs

1. Can I drive my car with a B1439 error code?

It is not recommended to drive your car with a B1439 error code as it can cause the wipers to malfunction or stop working altogether, which can be dangerous during rainy seasons.

2. How much does it cost to replace a wiper mode select switch?

The cost of replacing a wiper mode select switch varies depending on the make and model of your car. On average, it can cost between $50 to $150 for the part and labor.

3. Can I replace the wiper mode select switch on my own?

Yes, you can replace the wiper mode select switch on your own if you have the right tools and knowledge. However, if you are not confident in your abilities, it is recommended to seek the help of a professional mechanic.