How to Diagnose and Solve B1814 Wiper Rear Motor Down Relay Coil Circuit Failure Issues

Introduction

Car problems can be frustrating, especially when you don’t know what’s causing them. One of the most common issues that car owners face is the B1814 Wiper Rear Motor Down Relay Coil Circuit Failure. This problem can cause your wiper motor to stop working, making it difficult to drive in rainy or snowy conditions. In this article, we’ll discuss how to diagnose and solve this issue.

What is B1814 Wiper Rear Motor Down Relay Coil Circuit Failure?

B1814 Wiper Rear Motor Down Relay Coil Circuit Failure is a diagnostic trouble code (DTC) that indicates a problem with the wiper motor relay circuit. This code is usually triggered when the wiper motor relay coil circuit fails to operate properly. The wiper motor relay is responsible for controlling the wiper motor’s speed and direction.

Diagnosing B1814 Wiper Rear Motor Down Relay Coil Circuit Failure

To diagnose B1814 Wiper Rear Motor Down Relay Coil Circuit Failure, you’ll need a diagnostic scanner that can read DTCs. Here are the steps to follow:

Step 1: Connect the Diagnostic Scanner

Connect the diagnostic scanner to the OBD-II port under the dashboard. Turn on the ignition and wait for the scanner to establish a connection with the car’s computer.

Step 2: Read the DTCs

Select the “Read Codes” option on the scanner and wait for it to display the DTCs. Look for the B1814 code in the list of codes.

Step 3: Check the Wiper Motor Relay

The next step is to check the wiper motor relay. Locate the relay in the fuse box under the hood or dashboard. Remove the relay and inspect it for any signs of damage or corrosion. If the relay looks fine, use a multimeter to test its continuity.

Step 4: Check the Wiring

If the wiper motor relay is working fine, the next step is to check the wiring. Inspect the wiring for any signs of damage or corrosion. Use a multimeter to test the continuity of the wiring.

Step 5: Check the Wiper Motor

If the wiring is fine, the problem may be with the wiper motor itself. Remove the wiper motor and inspect it for any signs of damage or wear. Use a multimeter to test the motor’s continuity.

Solving B1814 Wiper Rear Motor Down Relay Coil Circuit Failure

Once you’ve diagnosed the problem, it’s time to solve it. Here are the steps to follow:

Step 1: Replace the Wiper Motor Relay

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

Step 2: Repair the Wiring

If the wiring is damaged, repair or replace it as necessary. Make sure to use wiring that’s compatible with your car’s make and model.

Step 3: Replace the Wiper Motor

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

Tips to Prevent B1814 Wiper Rear Motor Down Relay Coil Circuit Failure

Here are some tips to prevent B1814 Wiper Rear Motor Down Relay Coil Circuit Failure:

– Regularly inspect the wiper motor relay and wiring for signs of damage or wear.
– Replace the wiper motor relay and wiring as necessary.
– Use a high-quality wiper motor that’s compatible with your car’s make and model.

Conclusion

B1814 Wiper Rear Motor Down Relay Coil Circuit Failure can be a frustrating problem to deal with, but with the right diagnosis and solution, you can get your wiper motor working again. Follow the steps outlined in this article to diagnose and solve this issue.

FAQs

1. Can I drive my car with B1814 Wiper Rear Motor Down Relay Coil Circuit Failure?

It’s not recommended to drive your car with B1814 Wiper Rear Motor Down Relay Coil Circuit Failure, as it can make it difficult to drive in rainy or snowy conditions.

2. How much does it cost to fix B1814 Wiper Rear Motor Down Relay Coil Circuit Failure?

The cost to fix B1814 Wiper Rear Motor Down Relay Coil Circuit Failure can vary depending on the extent of the damage and the cost of replacement parts. It’s best to get a quote from a professional mechanic.

3. How can I prevent B1814 Wiper Rear Motor Down Relay Coil Circuit Failure?

Regularly inspecting the wiper motor relay and wiring for signs of damage or wear, replacing them as necessary, and using a high-quality wiper motor that’s compatible with your car’s make and model can help prevent B1814 Wiper Rear Motor Down Relay Coil Circuit Failure.