Molly Ayala
Electric window switches are a convenient feature of modern vehicles, allowing windows to be raised or lowered with a simple button press. However, these switches can fail over time due to various reasons, such as corroded wires or water ingress. When this happens, the window may become locked in one position, requiring a replacement of the switch. Fortunately, replacing an electric window switch is a relatively straightforward task that can be completed within an hour to an hour and a half. This guide will provide a comprehensive overview of the process, covering various vehicle models, to ensure a smooth and successful replacement.
| Characteristics | Values |
|---|---|
| Difficulty | Not difficult; does not require a huge degree of mechanical knowledge |
| Time | 1-1.5 hours |
| Cause of failure | Wires corroding or water getting into the door unit |
| Tools required | Small pocket flat tip screwdriver, electrical cleaner, needle nose pliers, multimeter |
| Steps | 1. Check power switch function. 2. Pry out locking tabs. 3. Clean out harness. 4. Install new switch. 5. Hook up harness to power window base/cluster. 6. Install door panel. 7. Check switch functions correctly. |
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What You'll Learn
Troubleshooting a malfunctioning electric window switch
Common Causes of Electric Window Switch Malfunction
Before troubleshooting, it is important to understand the common causes of electric window switch malfunctions. The issue could be attributed to a variety of factors, including:
- Blown fuses: A blown fuse is a common issue, which can be identified by a broken metal strip in the fuse box.
- Dirty or faulty switches: Over time, window switches can become dirty or worn, leading to malfunction.
- Electrical problems: Larger electrical issues could be preventing the window switch from functioning properly.
- Window regulator issues: The window regulator, which includes the motor and mechanism, may be worn, damaged, or stuck.
Initial Checks
Before proceeding with more advanced troubleshooting, there are some initial checks you can perform:
- Ensure that the window safety lock-out switch has not been activated accidentally, as this can prevent windows from rolling up or down.
- Inspect the fuses: Check for blown fuses and replace them if necessary, ensuring to use a fuse with the same amperage rating.
- Listen for sounds: When pressing the window switch, listen for any sounds from inside the door. If you hear a sound, it indicates that the switch is working, and the issue may lie with the window motor or regulator.
Advanced Troubleshooting
If the initial checks do not resolve the issue, you can proceed with more advanced troubleshooting techniques:
- Voltage testing: Use a voltmeter or a 12V test light to test the voltage at the switch plug. Proper voltage readings verify that the power supply and wiring up to the window switch are functioning correctly.
- Ohm testing: Utilize an ohmmeter to check the window switch. When the switch is depressed in the open or close direction, specific resistance readings will indicate whether the switch is functioning properly.
- Disassemble and clean the switch: If the switch is dirty, carefully disassemble it, clean the contacts, and then reassemble it. This can often resolve the issue.
- Inspect the window regulator: Remove the door panel and perform a visual inspection of the window regulator and motor. Look for any signs of damage, wear, or stuck mechanisms.
- Replace the window regulator or motor: If the issue persists, you may need to replace the window regulator or motor. Refer to manufacturer guidelines or seek professional assistance for this step.
Temporary Solutions
In some cases, you may be able to temporarily resolve the issue until you can get it properly repaired:
- Jarring the motor: If the switch works but the motor is faulty, try jarring the motor by holding the switch in the up or closed position and opening and slamming the car door.
- Using a jumper wire: As an alternative, you can try running a jumper wire directly from the battery positive terminal to the positive side of the motor to see if it temporarily comes alive.
It is important to remember that while these troubleshooting tips can help identify and resolve common issues, some problems may require specialized tools and professional assistance. If you are unsure or uncomfortable performing any of these steps, it is always best to consult a qualified mechanic.
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Removing the old switch
First, turn on the vehicle's electrics and test the switch to confirm that it is faulty. Turn the key to the 'on' position and press the switch to see if the window moves up and down. If the window does not open, the switch is likely broken and will need to be replaced.
Next, you will need to remove the bezel, which is the frame of the door where the switch is seated. Slowly remove the clips holding the bezel in place. You should now see tabs holding the switch in place. Use a flat-headed screwdriver to push these back and pop out the switch. Be careful, as these tabs are extremely sensitive and can break easily.
Now, disconnect the wire harness from the switch. The wire harness may have a small clip holding it in place. Once the wire harness is disconnected, you can move on to installing your new switch.
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Cleaning the contacts
To clean the contacts of an electric window switch, you will need to first remove the switch from the door panel. This process will vary depending on the specific make and model of your car, but typically involves prying the switch out using a flat-head screwdriver or a similar tool. Once the switch is removed, you can begin cleaning the contacts.
Using a soft brush, gently brush away any visible dirt, debris, or corrosion on the contacts. Be careful not to damage the delicate components. After brushing, apply a small amount of contact cleaner or isopropyl alcohol to a clean, soft cloth. Gently rub the contacts with the cloth, ensuring that you fully clean each contact. If the contacts are particularly dirty or corroded, you may need to use a more robust cleaning agent, such as a contact-specific electrical cleaner or a mild solvent.
After cleaning, leave the contacts to air-dry completely before proceeding. This step is crucial to ensure that no moisture remains on the contacts, which could cause damage or affect the switch's performance. Once the contacts are thoroughly dry, you can apply a thin layer of dielectric grease to the contacts. This grease will help protect the contacts from future corrosion and ensure smooth electrical connections.
Finally, once the grease has been applied, carefully reinstall the switch into the door panel, ensuring that it is securely locked into place. This process may require careful prying or clipping into place, depending on your car's specific design. With the switch reassembled and installed, test the electric window to ensure it is functioning correctly. Cleaning the contacts in this manner should help improve the reliability and performance of your electric window switch.
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Installing the new switch
Firstly, locate the door with the faulty power window switch. You will need to pry out the locking tabs using a small pocket flat-tip screwdriver. Be careful, as these tabs are sensitive and can break easily. Gently pry on the tabs and pull out the old switch from the base or cluster. If needed, use needle-nose pliers to help with this step.
Next, clean the harness with electrical cleaner to ensure a complete connection, removing any moisture and debris. Now, pop the new power window switch into the door lock cluster, making sure the locking tabs snap securely into place.
After the new switch is in place, hook up the harness to the power window base or cluster. Reconnect the door speaker and the electrical connections on the power window switch. Slide the front hook into the door panel, and snap the back into place.
Finally, install the door panel. Slide the door panel down and in towards the front of the car, ensuring the door handle is in place. Snap all the door tabs into the door to secure the door panel. If you removed any bolts or screws, be sure to reinstall them.
To check that the new switch is functioning correctly, turn on the vehicle's electrics and test the switch. The wiper motor should drive the window up and down in both directions.
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Testing the new switch
Once the switch is installed, turn on the vehicle's electrics and test the switch. Depress the switch, checking that the wiper motor is driving the window up and down in both directions. If the window is not opening, there may be a problem with the power window switch assembly or a possible electronic component failure.
If the switch is not working, you can test the circuit for continuity using a cheap meter. You can also use a multimeter to check the resistance across the motor terminals. If the motor is working, you should light up on the other wire when it is turning.
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