How to Diagnose and Solve B1459 Wiper Washer Pump Motor Relay Coil Circuit Open Issues

Introduction

If you’re experiencing issues with your wiper washer pump motor relay coil circuit, you may have encountered the B1459 error code. This code indicates that there is an open circuit in the relay coil, which can cause your wiper washer pump to malfunction. Fortunately, diagnosing and solving this issue is relatively straightforward, and you can do it yourself with a few basic tools and some knowledge of your car’s electrical system.

Step 1: Check the Fuse

The first step in diagnosing the B1459 error code is to check the fuse that controls the wiper washer pump motor relay coil circuit. Locate the fuse box in your car, which is usually located under the dashboard or in the engine compartment. Look for the fuse that corresponds to the wiper washer pump motor relay coil circuit, which should be labeled in your car’s owner’s manual.

Use a multimeter to test the fuse for continuity. If the fuse is blown, replace it with a new one of the same amperage rating. If the fuse is intact, move on to the next step.

Step 2: Check the Relay

The next step is to check the relay that controls the wiper washer pump motor. Locate the relay in your car’s fuse box, which should be labeled in your owner’s manual. Use a multimeter to test the relay for continuity. If the relay is faulty, replace it with a new one.

Step 3: Check the Wiring

If the fuse and relay are both functioning correctly, the next step is to check the wiring that connects the wiper washer pump motor to the relay. Look for any signs of damage or wear, such as frayed wires or loose connections. Use a multimeter to test the wiring for continuity. If you find any issues, repair or replace the wiring as necessary.

Step 4: Check the Wiper Washer Pump Motor

If the fuse, relay, and wiring are all functioning correctly, the issue may be with the wiper washer pump motor itself. Use a multimeter to test the motor for continuity. If the motor is faulty, replace it with a new one.

Step 5: Clear the Error Code

Once you have diagnosed and solved the issue with the wiper washer pump motor relay coil circuit, you will need to clear the B1459 error code from your car’s computer. Use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes to reset the computer.

Conclusion

Diagnosing and solving the B1459 error code is a relatively simple process that can be done at home with a few basic tools and some knowledge of your car’s electrical system. By following these steps, you can get your wiper washer pump motor back in working order and ensure that your car is safe and reliable on the road.

FAQs

1. Can I drive my car with the B1459 error code?

It is not recommended to drive your car with the B1459 error code, as it indicates a malfunction in the wiper washer pump motor relay coil circuit. This can cause your wiper washer pump to malfunction, which can be dangerous in inclement weather.

2. How much does it cost to replace a wiper washer pump motor?

The cost of replacing a wiper washer pump motor can vary depending on the make and model of your car, as well as the location of the repair shop. On average, you can expect to pay between $50 and $200 for a new wiper washer pump motor.

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

Replacing the wiper washer pump motor yourself is possible, but it requires some knowledge of your car’s electrical system and the proper tools. If you are not comfortable working on your car’s electrical system, it is recommended to take it to a professional mechanic.