How to Diagnose and Solve B1458 Wiper Washer Pump Motor Relay Circuit Failure Issues

Introduction

As a car owner, you may have experienced issues with your wiper washer pump motor relay circuit. One of the most common issues is the B1458 code, which indicates a failure in the circuit. This can be frustrating, especially when you need to use your wipers during a rainy day. In this article, we will guide you on how to diagnose and solve B1458 wiper washer pump motor relay circuit failure issues.

What is B1458 Wiper Washer Pump Motor Relay Circuit Failure?

B1458 is a diagnostic trouble code (DTC) that indicates a failure in the wiper washer pump motor relay circuit. This code is usually triggered when the powertrain control module (PCM) detects a malfunction in the circuit. The wiper washer pump motor relay circuit is responsible for controlling the wiper washer pump motor, which is used to spray washer fluid onto the windshield.

Diagnosing B1458 Wiper Washer Pump Motor Relay Circuit Failure

To diagnose B1458 wiper washer pump motor relay circuit failure, you will need a scan tool that can read DTCs. Here are the steps to follow:

Step 1: Connect the Scan Tool

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

Step 2: Read the DTCs

Read the DTCs using the scan tool. If the scan tool displays the B1458 code, then there is a failure in the wiper washer pump motor relay circuit.

Step 3: Inspect the Circuit

Inspect the wiper washer pump motor relay circuit for any damage or loose connections. Check the wiring harness, connectors, and fuses for any signs of wear or damage.

Step 4: Test the Relay

Test the wiper washer pump motor relay using a multimeter. Set the multimeter to the continuity mode and check if there is continuity between the relay terminals. If there is no continuity, then the relay is faulty and needs to be replaced.

Step 5: Test the Motor

Test the wiper washer pump motor using a multimeter. Set the multimeter to the voltage mode and check if there is voltage at the motor terminals when the wiper washer switch is turned on. If there is no voltage, then the motor is faulty and needs to be replaced.

Solving B1458 Wiper Washer Pump Motor Relay Circuit Failure

Once you have diagnosed the B1458 wiper washer pump motor relay circuit failure, you can proceed to solve the issue. Here are the steps to follow:

Step 1: Replace the Relay

If the relay is faulty, replace it with a new one. Make sure to use a relay that is compatible with your car’s make and model.

Step 2: Replace the Motor

If the motor is faulty, replace it with a new one. Make sure to use a motor that is compatible with your car’s make and model.

Step 3: Check the Wiring

Check the wiring harness, connectors, and fuses for any signs of wear or damage. Replace any damaged components.

Tips to Prevent B1458 Wiper Washer Pump Motor Relay Circuit Failure

Here are some tips to prevent B1458 wiper washer pump motor relay circuit failure:

– Regularly inspect the wiper washer pump motor relay circuit for any signs of wear or damage.
– Replace any damaged components immediately.
– Use a high-quality relay and motor that is compatible with your car’s make and model.

Conclusion

B1458 wiper washer pump motor relay circuit failure can be frustrating, but with the right tools and knowledge, you can diagnose and solve the issue. Remember to regularly inspect the circuit for any signs of wear or damage and replace any damaged components immediately.

FAQs

1. Can I still use my wipers if the B1458 code is triggered?

Yes, you can still use your wipers, but the washer fluid may not spray onto the windshield.

2. How much does it cost to replace the wiper washer pump motor relay circuit?

The cost of replacing the wiper washer pump motor relay circuit varies depending on the make and model of your car and the cost of the replacement parts.

3. Can I replace the wiper washer pump motor relay circuit myself?

Yes, you can replace the wiper washer pump motor relay circuit yourself if you have the right tools and knowledge. However, if you are not confident in your abilities, it is best to seek the help of a professional mechanic.