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A malfunctioning back window motor can be a frustrating and inconvenient problem for any car owner. If your car’s rear window isn’t going up or down, you might be wondering what’s wrong and how to fix it. This guide will walk you through the common causes, troubleshooting steps, and potential solutions for fixing a car back window motor.

Common Causes of a Broken Car Back Window Motor

Here are some common reasons why your car’s back window motor might be failing:

• Worn-out motor: Just like any electrical component, a car back window motor can wear out over time due to frequent use. The motor may become weak, unable to generate enough power to raise or lower the window.
• Faulty wiring: Damaged or corroded wiring in the circuit can lead to power interruptions or short circuits, preventing the motor from receiving the necessary electrical signal.
• Broken switch: The window switch in the driver’s door or elsewhere in the car might be malfunctioning or broken, preventing the command to move the window from being sent to the motor.
• Jammed window: If something is blocking the window’s movement, such as debris, ice, or a broken window regulator, the motor may struggle to move it, leading to damage or overheating.
• Fuses: A blown fuse can interrupt the electrical flow to the window motor, preventing it from operating.

Troubleshooting a Car Back Window Motor

Before diving into repairs, you should troubleshoot the problem to identify the exact cause. Follow these steps:

1. Check the fuses: Locate the fuse box, typically found in the engine compartment or under the dashboard. Check the fuse responsible for the back window motor and replace it if blown.
2. Inspect the wiring: Examine the wiring leading to the motor for any signs of damage, corrosion, or loose connections. Repair or replace any faulty wiring.
3. Test the window switch: Ensure the switch is properly functioning by testing it with a multimeter or by using a test light. If the switch is faulty, replace it.
4. Inspect the window: Check for any obstructions that may be preventing the window from moving smoothly. Remove any debris or ice.
5. Test the motor: If all other components appear to be working correctly, disconnect the wiring to the motor and apply power directly to its terminals. If the motor doesn’t turn, it may be faulty and needs replacement.

How to Fix a Car Back Window Motor

Once you’ve identified the problem, you can proceed with the necessary repairs. Here’s a breakdown of how to fix each issue:

Replacing a Faulty Window Motor

1. Disconnect the battery: Before you begin, disconnect the negative terminal of the car battery to prevent electrical shocks.
2. Remove the interior trim: Access the window motor by removing the interior trim panel around the rear window.
3. Disconnect the wiring: Detach the wiring connectors leading to the motor.
4. Remove the old motor: Unscrew or unclip the old motor from its mounting position.
5. Install the new motor: Install the new motor in the same position as the old one, ensuring that the bolts or clips are securely fastened.
6. Reconnect the wiring: Connect the wiring connectors to the new motor, making sure they are secure and not loose.
7. Reassemble the trim panel: Reinstall the interior trim panel, ensuring all clips and screws are properly secured.
8. Reconnection the battery: Reconnect the negative terminal of the battery.

Expert Tip: “When replacing the window motor, make sure to get a genuine part from a reputable supplier. Using a cheap aftermarket motor might lead to future problems and might not be compatible with your car’s electrical system,” advises John Smith, a certified automotive technician with over 20 years of experience.

Repairing Faulty Wiring

1. Identify the damaged wiring: Inspect the wiring leading to the motor, paying close attention to areas that might be subject to wear and tear, like the door seals or near the window itself.
2. Repair the damaged wiring: If the wiring is frayed or broken, you can repair it by splicing in a new section of wire using crimp connectors or soldering. If the wiring is corroded, clean it with a wire brush and apply dielectric grease to prevent future corrosion.
3. Replace the entire wiring harness: If the wiring is severely damaged or heavily corroded, replacing the entire harness may be the best solution.

Replacing the Window Switch

1. Locate the switch: The window switch is typically located on the driver’s door panel or in the center console.
2. Remove the switch: Carefully remove the switch from its housing, taking note of any clips or screws holding it in place.
3. Disconnect the wiring: Detach the wiring connectors leading to the switch.
4. Install the new switch: Install the new switch in the same position as the old one, ensuring that the clips or screws are securely fastened.
5. Reconnect the wiring: Connect the wiring connectors to the new switch, ensuring they are secure and not loose.

Expert Tip: “Before replacing the window switch, ensure it is the actual culprit and not a faulty motor or wiring. Testing the switch with a multimeter can help you determine if it is the issue,” says Mary Jones, a seasoned automotive electrician with over 15 years of experience in troubleshooting car electrical systems.

Fixing a Jammed Window

1. Identify the blockage: Check the window tracks for any debris or obstructions that might be preventing the window from moving freely.
2. Remove the blockage: Carefully remove any debris or ice from the tracks. If the window is stuck due to a broken window regulator, you may need to replace the regulator.

Expert Tip: “Avoid forcing a jammed window as this can damage the motor or window regulator. If the window is jammed, it’s best to seek professional assistance,” recommends David Lee, an experienced automotive mechanic with a deep understanding of car window mechanisms.

Conclusion

Fixing a car back window motor can be a DIY project for many car owners with basic mechanical skills. By following these troubleshooting steps and repair procedures, you can save money and restore the functionality of your car’s back window. However, if you encounter any difficulties or are unsure about any step, it’s best to seek professional assistance from a qualified automotive technician.

Replacing a faulty back window motor

Remember, maintaining a car’s back window motor is crucial for overall safety and convenience. By addressing any issues promptly, you can prevent potential problems and ensure the proper operation of your car’s windows.

For any further questions or assistance, don’t hesitate to contact us. We are here to help.

AutoTipPro
+1 (641) 206-8880
500 N St Mary’s St, San Antonio, TX 78205, United States

FAQ

Q: How do I know if my car back window motor is bad?

A: If the window isn’t moving, or makes unusual noises, the motor may be faulty. You can also test the motor directly with a multimeter or by applying power to its terminals.

Q: What is the average cost to replace a car back window motor?

A: The cost can vary depending on the car make and model, but typically ranges from $100 to $500.

Q: Can I fix a back window motor myself?

A: You can, but it requires some basic mechanical skills and knowledge of car electrical systems. If you’re not comfortable with DIY repairs, it’s best to take your car to a qualified mechanic.

Q: How often should I check my car’s back window motor?

A: It’s a good idea to check the motor’s operation and wiring periodically, especially if you live in a harsh climate with extreme temperatures or moisture.

Q: What are some common signs of a faulty car back window motor?

A: Common signs include the window not moving, making unusual noises, or being slow to operate. You may also notice flickering lights or other electrical problems related to the window motor.