B1406 Driver Power Window Down Circuit Short To Ground

How to Fix B1406 Driver Power Window Down Circuit Short to Ground


If you’re experiencing issues with your car’s power window, specifically the driver’s side, and you’ve received the B1406 error code, then you’re in the right place. This error code indicates that there is a short circuit to ground in the driver power window down circuit. This can be a frustrating issue to deal with, but with the right tools and knowledge, you can fix it yourself. In this article, we’ll provide you with a step-by-step guide on how to fix the B1406 error code.

Tools You’ll Need

Before we get started, you’ll need to gather a few tools to help you with the repair. Here’s a list of what you’ll need:

  • Socket set
  • Multimeter
  • Wire strippers
  • Electrical tape
  • Soldering iron
  • Heat shrink tubing

Step-by-Step Guide

Step 1: Disconnect the Battery

The first step in any electrical repair is to disconnect the battery. This will prevent any accidental shocks or damage to the electrical system. Locate the battery in your car and use a socket set to remove the negative cable.

Step 2: Remove the Door Panel

Next, you’ll need to remove the door panel to access the power window motor. Use a socket set to remove any screws or bolts holding the panel in place. Once the screws are removed, gently pry the panel away from the door frame.

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Step 3: Test the Power Window Motor

Using a multimeter, test the power window motor to ensure it’s functioning properly. Connect the multimeter to the motor and activate the power window switch. If the multimeter reads a voltage, then the motor is working correctly.

Step 4: Check the Wiring

If the power window motor is functioning correctly, then the issue may be with the wiring. Check the wiring for any signs of damage or wear. Use wire strippers to remove any damaged sections of wire and replace them with new wire.

Step 5: Solder the Wiring

Once you’ve replaced any damaged wiring, use a soldering iron to connect the new wire to the existing wiring. Cover the soldered connection with heat shrink tubing and use a heat gun to shrink the tubing in place.

Step 6: Reassemble the Door Panel

Once you’ve completed the repair, reassemble the door panel by reversing the steps you took to remove it. Make sure all screws and bolts are tightened securely.


Fixing the B1406 error code may seem like a daunting task, but with the right tools and knowledge, it’s a repair that you can do yourself. By following our step-by-step guide, you’ll be able to fix the issue and get your power window working again in no time.


1. Can I fix the B1406 error code myself?

Yes, you can fix the B1406 error code yourself with the right tools and knowledge. Follow our step-by-step guide to help you through the repair process.

2. How long does it take to fix the B1406 error code?

The time it takes to fix the B1406 error code will depend on your level of experience and the tools you have available. It can take anywhere from a few hours to a full day to complete the repair.

3. What if I’m not comfortable with electrical repairs?

If you’re not comfortable with electrical repairs, it’s best to take your car to a professional mechanic. They’ll have the tools and knowledge to fix the issue quickly and safely.