Wiktor Wise
Electric windows in cars can stop working for a variety of reasons, causing them to get stuck open or stuck shut. This can be a major inconvenience, as it can lead to issues such as being unable to close the windows during rain or secure valuables inside the car. The root cause of the problem could be either mechanical or electrical. If the window switch is not working, the issue could be due to a blown fuse, bad switch, burned-out motor, or a stuck window regulator. If the switch is working, the problem may lie with the wires, fuses, or the power window motor. In some cases, a temporary solution to roll up a stuck electric window involves turning the ignition key to the 'on' or 'accessory' position, pressing and holding the window switch in the closed or up position, and then opening and slamming the car door.
| Characteristics | Values |
|---|---|
| Problem | Electric window stuck open or shut |
| Cause | Mechanical or electrical issue |
| Diagnosis | Press the window switch and listen for any noise |
| Electrical issue | No noise when pressing the switch |
| Mechanical issue | Noise but no movement when pressing the switch |
| Electrical issue fix | Locate and replace blown fuse |
| Mechanical issue fix | Remove door panel, undo securing screws, check electrical input on power and ground wires |
| Other causes | Bad switches, burned-out motors, worn window regulator |
| Temporary fix | Turn ignition key to on, press and hold window switch, slam car door |
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What You'll Learn
Diagnose the issue: electrical or mechanical
Diagnosing whether the issue with your electric window is electrical or mechanical is a process of elimination. There are a few simple tests you can do to identify the problem. Firstly, check the window safety lock-out switch. It is easy to accidentally bump this switch without realising. If the lockout switch is activated, the windows won't roll up or down.
If the lock-out switch is not activated, the next step is to check for power. If the window switch is not getting power, it may indicate a larger electrical issue that will need to be inspected by a qualified mechanic. If the switch is getting power, but no power is coming out, replace the window switch. If power is coming out of the switch, the problem could be with the fuse, wires, or the power window motor.
If you press the window switch and hear or see the window trying to move, it is likely a mechanical issue. If you hear a sound from inside the door when you push the switch, the switch is probably working, and the problem could be with the electric window motor or the regulator. If the volt gauge on your dash moves, even slightly, when you push the switch, this also indicates a bad motor. If the motor and switch are both working, the problem could be with the window regulator, which may be stuck, worn out, or bent.
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Check for blown fuses
If your car's electric windows are stuck open or stuck shut, the root of the problem could be electrical. One of the first steps you can take to resolve the issue is to check for blown fuses.
Fuses are safety mechanisms designed to protect the electrical wiring of a car. They prevent the overflow of current, which can damage an electrical circuit. When a fuse blows, the ribbon that allows the current to pass through melts and kills the circuit. This happens when too much current passes through, usually due to a malfunctioning device.
To check for a blown fuse, first, turn off the vehicle and locate the main fuse box. This is usually located in the driver's side footwell, underneath the dashboard. There may also be a second fuse box under the hood or in the passenger foot well area. Consult your owner's manual to determine the exact location of each fuse box.
Once you have located the correct fuse box, you will need to identify the blown fuse. Most fuse boxes have a diagram showing the function and location of each fuse. If your fuse box does not have a diagram, you may need to use a test light or multimeter to identify the blown fuse.
To use a test light, turn the ignition on but keep the engine off. Attach the clip for the test light to any exposed metal. Then, use the probe to touch each end of each fuse. If the fuse is working properly, the test light will illuminate on both sides. If the fuse is blown, only one side will light up.
To inspect the fuse, remove it from the fuse box using a fuse puller or a pair of needle-nose pliers. Look at the side of the fuse and inspect the filament inside. If it is broken, the fuse is blown. A blown fuse may also be indicated by blackening, warping, or melting of the plastic case.
Remember, a blown fuse can be a sign of a larger electrical issue. If you have a fuse that blows repeatedly, it is recommended to have an auto electrician inspect your car for faults.
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Inspect wires for damage
If your electric window isn't working, it could be due to a problem with the wiring. To inspect wires for damage, you should first expose the wires connected to the window component. This may require removing interior trim panels and protective plastic tubing. Once the wires are exposed, visually inspect them for any signs of damage, such as exposed copper wire, frayed insulation, bite marks, loose or damaged connectors, or wiring that appears brittle or cracked.
If you notice any damage, you can test the wires for continuity to see if electricity is able to flow through them. Set a multimeter to the "continuity" setting and place the probes on either end of the wire. If the multimeter reading is infinite ohms or OL (out of limits), it indicates an electrical open circuit, and the wire is likely bad.
You can also check for voltage by touching the multimeter's negative lead to a good ground and placing the positive lead on the positive terminal of the non-working accessory. If there is no voltage, the wire may be broken. Additionally, you can use your sense of smell and feel to troubleshoot wiring faults. Pull firmly on each end of the wire and trace along the wiring harness, feeling for rough spots. Smell the rough spots for a burned odour, which could indicate wire damage.
To prevent wire damage, it is recommended to regularly inspect under-hood areas for signs of rodent infestation and clean the engine bay to remove food particles. Routine inspections can help detect potential problems early on and prevent costly repairs.
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Test the window switch
If your car's electric windows are stuck open or shut, the root of the problem could be mechanical or electrical. If you press the window switch and hear or see the window attempting to move, it's likely a mechanical issue. Conversely, if you press the switch and nothing happens, it's probably an electrical issue.
To test the window switch, you will need a test light. A regular bulb test light may damage the electronics, so it is better to use a positive/negative test light that plugs into a cigarette lighter or has a receptacle with large alligator clips to connect directly to the battery. This type of test light is called a CSTL (Circuit Sage Test Light).
Once you have your test light, follow these steps:
- Identify the wires that lead from the switch to the motor.
- Disconnect the connector that allows power to reach the power window motor. You may need to use a flat-blade screwdriver for this step.
- Turn on the ignition to power up the car's electronic components, including the power window mechanism.
- Connect a straight pick to the lead end of the test light.
- Lightly touch the terminals of the connector with both ends of the test light, being careful not to push them in too hard.
- Flip the power window switch up and down and observe the test light.
If the test light illuminates, it indicates that the switch is receiving power from its battery connection. In this case, use the test light to check for power at each connector terminal while activating the power window switch up and down. If there is still no power, test for ground at the switch.
If the power window switch has adequate power and ground but the connection to the power window motor is lacking, the switch is not sending power to the window regulator. This issue could be caused by a faulty switch or a broken circuit due to damaged wires.
If the test light illuminates when probing both terminals of the connector, it indicates that the switch and its connection are functioning correctly.
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Try a temporary fix by holding the window switch
If your driver's side window is stuck in the down position, you can try a temporary fix by holding the window switch. Here are some detailed steps to help you through the process:
Firstly, it is important to determine the issue. If your window switch is not working, it could be due to a faulty switch, a problem with the wiring, or an issue with the window motor itself. Start by checking if the passenger side window switch works. If it does, try using it to control the driver's side window. If the passenger side switch can operate the driver's window, then the issue is likely with the driver's side switch.
In this case, you can attempt a temporary fix by pressing and holding the window switch in the desired direction (up or down). Hold the switch for an extended period, and the window motor may eventually engage and move the window. This method can sometimes work, especially if the switch has a minor fault or corrosion.
While holding the switch, you may also try to gently tap or shake the switch panel with your other hand. This action might help jar the switch or the motor into functioning.
If your car has a key fob with window controls, you can also try using it as a temporary fix. Press and hold the window button on the key fob to see if you can operate the window.
These temporary fixes are not guaranteed to work and are only short-term solutions. If the window does not respond, or if the temporary fix stops working, you will need to address the root cause of the issue. This may involve replacing the switch, repairing the wiring, or replacing the window motor.
It is important to note that working on a car's electrical system can be complex and potentially dangerous. If you are unsure or uncomfortable with any of these procedures, it is always best to consult a professional mechanic or a specialist auto electrician.
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Frequently asked questions
There are three main causes of power window failure: blown fuses, bad switches, and burned-out motors. It could also be a mechanical or electrical issue.
First, check the window safety lock-out switch. If the lockout switch is activated, the windows won't roll up or down. Next, check the fuses with a test light. If the fuses have power, move on to checking the wires. If the wires are intact, the problem might be with the window switch or the window motor.
Gather the necessary materials, including a replacement window switch if needed. Remove the door panel, locate the securing screws, and undo them. Then, follow the steps to repair the mechanical problem.
Locate and check the fuse for the problematic window motor. If it's blown, replace the fuse. Remove the door panel and check the electrical input on the power and ground wires connected to the window motor. If the issue persists, consult a qualified mechanic.
