Trystan Casey
Renault Megane electric windows have been a source of frustration for many owners, with some reporting that their windows fail to open or close properly, and others experiencing issues with water leakage. While some have resorted to paying high costs for repairs, others have opted to fix the problem themselves using online resources and advice from fellow owners. This article will explore the common issues and potential solutions for fixing electric windows in the Renault Megane.
| Characteristics | Values |
|---|---|
| Problem | Windows won't open or close |
| Cause | Water damage, faulty fuses, faulty control electronics, faulty sensors, faulty switches, faulty controllers, faulty motors, faulty circuit boards |
| Fix | Contact Renault for free fix (if car is under 7 years old), remove 40amp fuse and double lock car, reset window, remove and replace fuses, spray chip board with Maplin Electronic Solvent Cleaner, spray everything with WD40 and replace insulation tape |
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What You'll Learn
Fixing a Renault Megane window regulator
Electric windows in Renault Megane cars have been a common issue for owners of the vehicle. Some have complained about windows getting stuck, while others have had issues with water leaking into the door pocket.
If your window is stuck in the down position, one solution is to remove the 40amp fuse from the glove compartment and then double lock the car by pressing the lock button on the key fob twice. This method has been known to work for some owners.
Another fix involves resetting the window. With the driver's door open, remove one of the 25 amp fuses—there is one fuse for each window. Replace the fuse, close the door, and double lock the car. If the motor is working, the window should close by about an inch. Unlock the car, open the driver's door, remove the fuse, and repeat the process if the window does not close fully.
If your window is stuck in the up position, one owner suggests holding the switch in the up position for around 10 seconds, then letting the window go down and holding the switch in the down position for another 10 seconds. This should reset the window.
For those experiencing issues with water leaking into the door pocket, one owner found that their circuit board was damp, with water squeezed out from the foam wrapped around the cables. They sprayed everything with WD40 and replaced the insulation tape.
If you are unable to fix the issue yourself, it is recommended to contact a Renault dealer or an approved mechanic. The cost of repairing or replacing the window regulator can vary, but some owners have reported expenses of several hundred dollars or more.
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Removing the door panel
To remove the door panel of a Renault Megane, you will need to first take off the small plastic triangle at the bottom corner of the window above the door. It should come off easily if you pull it gently. Next, remove the two long bolts at the bottom of the door and prise out the door light. Inside the door, you will find three screws. One screw is located above and to the right of the speaker, the second screw is to the right of the first, and the third screw is under the black plastic trim piece. Remove the trim piece by unclipping it and then take out the screw. Be careful when removing the trim piece as you will need to put it back in the same way when reassembling the door panel.
Once all the screws are removed, you can lift off the plastic panel by pushing it up from the bottom and then pulling it towards you. The motor is attached to this panel. Note that you may need to unclip the speaker grille to fully remove the door panel, so be careful when removing it. Additionally, remember to unplug the electric mirrors if your car has them.
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Resetting the window
Resetting the electric windows on a Renault Megane can be done in several ways, depending on the model of the car and the nature of the problem.
One method, which appears in the owner's manual for the 2005 Megane, involves a 10-second reset:
- Press the window switch to lower the window.
- Hold the switch for 10 seconds.
- Release the switch.
- Press the switch again to raise the window.
- Hold the switch for 10 seconds.
- Release the switch.
Another method, which applies to the Megane II, is for resetting the windows after disconnecting the battery:
- Lift the window.
- Once fully closed, lift and hold the corresponding switch on the driver's door for longer than 2 seconds.
- Lower the window fully.
- Once fully open, press and hold the corresponding switch on the driver's door for longer than 2 seconds.
In case of a fault when closing a window, the system can be reinitialised:
- Pull the switch concerned up as often as necessary to fully close the window.
- Hold the switch (still on the closure side) for approximately one second.
- Lower and raise the window fully.
If the window only opens an inch or so at a time, the following method may work:
- Press the button until the window goes to the bottom.
- Hold down the button for 20 seconds.
- Wind the window to the top.
- Hold down the button again for 20 seconds.
If the window is stuck, one user suggested the following:
- Remove the 40-amp fuse from the glove compartment.
- Double lock the car by pressing the lock button on the key fob twice.
- Put the fuse back in.
If none of these methods work, it may be necessary to contact a Renault dealer or mechanic.
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Sealing the window regulator
To begin the sealing process, you will need to remove the door card or panel to access the internal components. This typically involves carefully prying off the plastic trim and removing screws to avoid damaging the door card. Once the door card is removed, you can inspect the window regulator and motor assembly for any signs of water damage or corrosion.
If you find evidence of water ingress, clean the affected areas thoroughly and ensure they are completely dry. You may need to scrape or file away any corrosion or residue on the connector pins and plugs. After cleaning and drying, apply a suitable lubricant, such as WD-40, to the components.
To seal the window regulator effectively, you can use silicone or a similar sealant. Apply the silicone to the cleaned and lubricated components, ensuring that all areas susceptible to water ingress are properly coated. You may also want to consider adding an additional layer of protection, such as a "skirt" made from a freezer bag, as suggested by one Megane owner.
Additionally, it is worth inspecting the grey seal that covers the regulator. This seal may need to be replaced or enhanced with additional sealant to ensure it effectively prevents water ingress.
By following these steps and paying close attention to detail, you can seal the window regulator on your Renault Megane, helping to prevent further issues caused by water ingress and corrosion.
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Cleaning the circuit board
Identify the Contaminants
Before starting the cleaning process, it is crucial to identify the types of contaminants present on the circuit board. Different contaminants, such as dust, flux residues, and corrosion , may require specific cleaning approaches.
Shut Down the System
Before physically cleaning the circuit board, ensure that the system is completely shut down to prevent any potential damage. This is an important safety precaution.
Brushing
Gently use a small brush, such as a fine detail or touch-up paintbrush, to remove dust and debris from the surface of the board. Be careful when brushing to avoid damaging any delicate components.
Compressed Air
Compressed air can be used to blow away dirt and dust from tight spaces and under components. However, exercise caution as too much force or pressure can damage connections and sensitive electronic components.
Specialized Cleaning Agents
If your circuit board has more stubborn contaminants or wet residues, you may need to use specialized cleaning agents specifically formulated for use with PCBs. Ensure that the cleaning agent is mild enough to avoid damaging the board's plastics and markings. Some stronger agents can chemically strip the traces on the PCB.
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Ultrasonic cleaning is a professional method that utilizes high-frequency sound waves to create billions of tiny bubbles in a tank of cleaning solution. This effectively removes dust, debris, and contaminants without damaging sensitive components. However, note that this method may not be suitable for all types of PCBs.
Allow Drying Time
After cleaning, ensure that the circuit board is thoroughly dried before reassembling it. Place it in a well-ventilated area or leave it to air dry for an extended period to ensure no moisture remains.
Remember to handle the circuit board with care during the cleaning process, as the components and connections are delicate and prone to damage without the proper technique. Always wear appropriate protective gear, such as gloves and eye protection, when handling cleaning agents and chemicals.
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Frequently asked questions
Try the "remove 40amp fuse and double lock car trick". Remove the 40 amp fuse in the glove compartment, place it back in, and then double lock the car by pressing the lock button on your key fob twice.
You can try to fix this yourself by removing the door panel and spraying the circuit board with WD40.
First, take off the small plastic triangle at the bottom corner of the window above the door. Then, remove the two long bolts at the bottom of the door and prise out the door light. Inside the door, there are three screws: one above and to the right of the speaker, one to the right of that holding the plastic, and the last one is under the black plastic trim piece. Unclip this screw and remove it. Finally, push the plastic panel up from the bottom and then towards you.
This could be due to a faulty regulator. You can try to fix this by taking apart the regulator and spraying the chip board with Maplin Electronic Solvent Cleaner.
Try an electric reset process. With the driver door open, remove one of the 25 amp fuses—there is one for each window. Replace the fuse, close the door, and double lock the car by pressing the key fob lock button twice. If the motor is working, the window should close about an inch. Then, unlock the car, open the driver door, remove the fuse, and start again.
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