How to Diagnose and Solve B1779 Mirror Driver Down Circuit Open Issues

Introduction

If you’re experiencing issues with your car’s mirror driver down circuit, you may see a B1779 error code. This can be frustrating, but with the right knowledge and tools, you can diagnose and solve the problem yourself. In this article, we’ll provide step-by-step instructions and useful tips to help you fix the issue.

What is the Mirror Driver Down Circuit?

The mirror driver down circuit is responsible for controlling the movement of your car’s side mirrors. When this circuit is open, it means that there is a break in the electrical connection, preventing the mirrors from moving. This can be caused by a variety of factors, including damaged wiring or a faulty mirror control switch.

Diagnosing the Issue

To diagnose the B1779 error code, you’ll need a multimeter and a wiring diagram for your car’s mirror control system. Here are the steps to follow:

Step 1: Check the Mirror Control Switch

The first step is to check the mirror control switch. Use the multimeter to test the switch’s continuity. If the switch is faulty, it will need to be replaced.

Step 2: Check the Wiring

If the switch is working properly, the next step is to check the wiring. Use the wiring diagram to locate the mirror driver down circuit and test it for continuity. If there is a break in the circuit, you’ll need to repair or replace the damaged wiring.

Step 3: Check the Mirror Motor

If the wiring is intact, the issue may be with the mirror motor itself. Use the multimeter to test the motor’s resistance. If the resistance is outside of the manufacturer’s specifications, the motor will need to be replaced.

Solving the Issue

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

Step 1: Replace the Faulty Mirror Control Switch

If the mirror control switch is faulty, replace it with a new one. This should solve the issue.

Step 2: Repair or Replace the Damaged Wiring

If there is a break in the mirror driver down circuit, repair or replace the damaged wiring. This will restore the electrical connection and allow the mirrors to move again.

Step 3: Replace the Faulty Mirror Motor

If the mirror motor is faulty, replace it with a new one. This will restore the movement of the mirrors.

Conclusion

Diagnosing and solving B1779 mirror driver down circuit open issues may seem daunting, but with the right knowledge and tools, it can be done. By following the steps outlined in this article, you can fix the issue yourself and save money on costly repairs.

FAQs

1. Can I drive my car with a B1779 error code?

It’s not recommended to drive your car with a B1779 error code, as it can affect the movement of your side mirrors. This can be a safety hazard, especially when changing lanes or parking.

2. How much does it cost to fix a B1779 error code?

The cost of fixing a B1779 error code can vary depending on the cause of the issue. If it’s a simple fix like replacing a faulty mirror control switch, it may only cost a few dollars. However, if the issue is with the mirror motor or wiring, it can cost several hundred dollars.

3. Can I fix a B1779 error code myself?

Yes, you can fix a B1779 error code yourself if you have the right knowledge and tools. However, if you’re not comfortable working with electrical systems, it’s best to leave it to a professional mechanic.