Otis Singleton
If you're experiencing issues with the electric windows of your VT Commodore, there are several potential causes and solutions. One common problem is that the windows may struggle to go up or down smoothly, which could be due to faulty wiring or issues with the window regulator or motor. To fix this, you may need to replace the regulator or motor, or simply lubricate the window tracks to reduce resistance. Additionally, ensuring that the correct relays and fuses are in place is crucial for proper window operation. In some cases, it may be necessary to consult a mechanic or refer to a detailed guide specific to your vehicle for a comprehensive troubleshooting and repair process.
| Characteristics | Values |
|---|---|
| Problem | Electric windows are stuck or struggling to go up/down |
| Cause | Binding of cables in the window regulator, faulty wiring, ageing car |
| Solution | Lubricate the window mechanism, replace the regulator, check wiring |
| Parts Required | Regulators, main switch block, door looms, rear door switches, relay, fuse |
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What You'll Learn
Check the window regulator or motor
If your VT Commodore's electric windows are malfunctioning, it is likely that there is an issue with the window regulator or motor. Window regulators can fail due to wear and tear, with common issues including frayed cables, damaged gears, or motors burning out. Dirt, moisture, or rust can also cause components to degrade, especially in older models.
To check the window regulator or motor, you will need to remove the door panel to access the components. This process will vary depending on the specific model of your VT Commodore, so it is recommended to refer to a repair manual or online guide specific to your vehicle. Once you have removed the door panel, you can inspect the window regulator and motor for any visible signs of damage or wear.
One common issue with window regulators is frayed or bound-up cables, which can cause an excessive amperage pull on the motor, leading to its failure. If the cables appear damaged or frayed, they will need to be replaced. Additionally, check the gears for any signs of damage or wear, as damaged gears can also cause the window regulator to malfunction.
If the window motor is burning out, it may need to be replaced. However, before replacing any parts, it is important to consult a professional mechanic, especially if you are uncomfortable handling wiring or electrical components. They will be able to diagnose the issue accurately and recommend the necessary repairs or replacements.
It is recommended to source replacement parts from reliable suppliers, ensuring that they are of high quality and compatible with your specific VT Commodore model. This will help ensure a proper fit and maintain the safety and functionality of your vehicle's windows.
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Check the wiring
If you're experiencing issues with the electric windows of your VT Commodore, it could be due to faulty wiring. Here are some steps to help you check and address the wiring:
Firstly, locate the wiring harness for the window regulator. This is usually located behind the door panel. Remove the door panel carefully to access the wiring and components behind it. Check for any visible signs of damage, such as frayed or exposed wires, as this could be causing the malfunction.
Next, inspect the wiring for any signs of corrosion or damage. Corroded or damaged wires can cause a loss of connectivity, preventing the windows from operating properly. If you notice any corrosion or damage, clean or replace the affected wires.
Another potential issue could be a loose connection. Ensure that all the wires are securely connected to the window regulator and that there is no slack in the wiring. You can carefully tighten any loose connections using appropriate tools.
Additionally, check for any signs of wear or damage on the wire rope of the electric regulator. A very tight wire rope, as mentioned by one VT Commodore owner, could indicate an issue. If the wire appears overly tight or strained, there may be a problem with the regulator or its installation.
Finally, if you suspect a problem with the main switch or BCM wiring, as suggested by a Commodore expert, you can perform a voltage test. With the pillar connector unplugged, apply 12 volts to the relevant window motor wires (blue/white and green/orange). This should cause the window to move in one direction. By swapping the wires, you can move the window in the opposite direction. To test the main switch, leave the connector plugged in and back probe the blue/white and green/black wires. You should measure 12 volts and observe a polarity change when activating the switch in different directions.
By following these steps, you can identify and address wiring issues related to your VT Commodore's electric windows. Remember to exercise caution when working with electrical components and refer to a professional mechanic if you're unsure about any aspects of the diagnosis or repair process.
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Check the main switch block
To check the main switch block of your VT Commodore, you'll need to locate the window control switch panel, which is typically found on the driver's side door. Once you've found the panel, you can proceed with the following steps:
Begin by removing the switch block from the door. This may involve carefully prying it out with a flat-head screwdriver or removing screws to detach the panel. Be gentle to avoid damaging any components.
With the switch block removed, inspect it closely for any signs of damage or corrosion. Look for any burnt or melted components, as this could indicate a short circuit or faulty connection. Pay attention to the wiring and connectors as well, ensuring that they are intact and securely connected.
If you notice any damage or corrosion, it's important to clean or replace the affected parts. In some cases, you may need to replace the entire switch block assembly. Before doing so, try cleaning the contacts with an electrical contact cleaner and a small brush to remove any corrosion or debris.
Once you've inspected and cleaned the switch block, reinstall it securely in the door. Ensure that it is properly aligned and fastened in place. Reconnect any wiring harnesses or connectors that you may have disconnected during removal.
After reinstalling the switch block, test the electric windows to see if they are now functioning properly. Operate each window using the corresponding switch to ensure they are opening and closing smoothly. If the issue persists, there may be another factor causing the problem, such as a faulty window regulator or a blown fuse.
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Check the relay
To check the power window relay on a VT Commodore, first locate the relay in the fuse box, which is usually in the engine bay or near the battery. The relay is typically a black box with a plastic cover and may be labelled "Power Window Relay".
With the relay located, you can now perform a visual inspection. Check for any signs of damage, corrosion, or melting on the relay and its wiring. Ensure that all the connections are secure and that there is no dirt or debris present. If everything appears intact and properly connected, the relay and its wiring are likely not the source of the issue.
If the relay looks damaged or corroded, it may need to be replaced. Before replacing the relay, check the owner's manual or a repair guide to ensure you are using the correct type of relay for your vehicle. Also, check the fuse associated with the power window system, as a blown fuse could be the reason the relay is not functioning.
To further test the relay, you can use a multimeter to check for continuity between the relay's terminals. With the relay disconnected, set the multimeter to the ohmmeter setting and place the probes on the appropriate terminals. If there is no continuity, the
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Lubricate the window mechanism
Lubricating the window mechanism of your VT Commodore can help ensure that its components have a longer life, saving you money in the long run. Over time, the existing lubricant can become contaminated with dirt, causing excessive wear on certain components.
To lubricate the window mechanism, you will first need to remove the door panel. Start by locating and removing any fasteners. There may be Phillips screws hidden behind plastic caps, which you can remove with a screwdriver. Disconnect the wires at the rear of the window switches, and then remove the door handle by unscrewing it and sliding it forward to disconnect it from the door.
Next, you will need to clean away the old lubricant or dirt. Apply a degreaser to a paper towel or rag, or lightly spray it onto the track. You can also use a vacuum and brush to clean the vertical rubber tracks. Once the track is clean, apply a rubber-safe lubricant to the vertical rubber tracks. Then, apply grease to the metal tracks inside the door, both the horizontal and vertical mechanisms. Make sure to cover any wear marks where the mechanism runs.
Finally, reinstall the door panel. Start by reattaching the door handle and window switches, and then secure any screws or trim pieces. Once the door panel is reinstalled, test the window mechanism by operating the window a few times. You should notice that it operates more quietly and smoothly.
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Frequently asked questions
When a power window no longer responds, it is usually a problem with the window regulator or motor located inside the vehicle door. The cables of the regulator may be bound up, causing an excessive amperage pull on the motor.
You will need the main switch block, door looms, rear door switches, and regulators. You may also need a relay and a fuse.
The plug is about 1 and a half inches wide and has 8 or 10 wires attached.
Try lubricating the window so that it slides easier. You can also try using CRC or graphite powder.
