Rear Power Window Stopped Working on One Side

You roll down the rear window on one side, and it won't come back up. Or maybe it stopped responding entirely no sound, no movement, nothing. A rear power window that stopped working on one side is one of the most common car electrical problems drivers face, and it's frustrating because it affects comfort, security, and even weather protection. The good news is that the cause is usually identifiable, and in many cases, it's something you can fix without replacing the entire door assembly.

What causes a rear power window to stop working on just one side?

When only one rear window stops working, it usually rules out problems with the main fuse or the master switch on the driver's door. The issue is isolated to that specific door's circuit. The most common culprits are:

Failed window motor The motor that drives the glass up and down wears out over time. This is the single most common reason.
Broken window regulator The mechanical linkage (cable, scissor arm, or track) that guides the glass can snap or derail.
Bad window switch The individual switch on that door or the rear switch on the driver's master panel can fail.
Damaged wiring Wires running through the door hinge area flex thousands of times and eventually break.
Blown fuse for that circuit Some vehicles split rear windows across separate fuses.

How do I figure out which part is actually broken?

Start with the simplest checks first. Press the switch on the affected door and listen. If you hear the motor humming but the glass doesn't move, the motor works but the regulator is likely broken. If you hear nothing at all, the motor, switch, or wiring could be at fault.

Try the driver's master window switch for that same rear window. If the window works from the master switch but not from the door itself, the individual door switch is the problem. If it doesn't work from either switch, the motor or wiring is more likely. You can find a more detailed walkthrough in our rear power window motor diagnosis guide.

Is it the window motor or the regulator?

These two parts get confused constantly, but they do very different things. The window motor is the electric component a small DC motor that spins when you press the switch. The window regulator is the mechanical frame, cables, or arms that convert that spinning motion into the up-and-down movement of the glass.

If the motor runs (you hear it) but the glass sits still or drops down inside the door, the regulator is broken. If the motor is silent even when you apply power directly to it, the motor itself has failed. Some modern vehicles use a combined motor-regulator assembly, meaning you replace both as one unit.

What does a bad window regulator sound like?

A failing regulator often makes grinding, clicking, or popping noises before it stops working entirely. You might also notice the glass moving unevenly, tilting to one side, or sliding down on its own after you close the window. A cable-type regulator will sometimes make a rapid ticking sound when the cable snaps and starts wrapping loosely around the spool.

Could it just be a blown fuse?

Yes, and it's worth checking before pulling apart the door. Your owner's manual will show which fuse controls the rear windows. On some vehicles, the left and right rear windows share a single fuse. On others, each window has its own fuse or is protected by a circuit breaker. If the fuse is blown, replace it once. If it blows again immediately, there's a short in the wiring or the motor is drawing too much current that means a deeper electrical problem you shouldn't ignore.

Can a bad switch cause only one window to fail?

Absolutely. Both the individual switch on the rear door and the corresponding rear window button on the driver's master switch can fail independently. If you want to rule out a switch problem without buying a new one, you can use a multimeter to check for voltage output when the switch is pressed. No voltage out means the switch is the issue.

There's also a child lock or window lock button on the driver's door panel. If that's been pressed often by accident it disables the rear window switches. Check that first; it's a two-second fix that people overlook for weeks.

What about the wiring inside the door?

The wiring harness that runs from the car body into the door passes through a rubber boot near the hinges. Every time you open and close the door, those wires flex. Over years, individual wires can fatigue and snap sometimes without visible damage from the outside. This is a well-known problem on vehicles with high mileage or on rear doors that get heavy use (think minivans and SUVs).

If you've confirmed the motor and switch are fine, checking for power at the motor connector is the next logical step. No power at the motor with a good fuse and good switch points directly to a wiring break.

How much does it cost to fix a rear power window on one side?

Costs depend on what's actually failed and whether you do the work yourself:

Window switch replacement $15–$60 for the part (aftermarket), 15 minutes of labor
Window motor replacement $40–$150 for the part, 1–2 hours of labor
Window regulator replacement $50–$200 for the part, 1–2 hours of labor
Wiring repair $20–$50 in supplies if you do it yourself, or $100–$300 at a shop
Shop labor (full repair) $150–$400 total depending on the vehicle and what's needed

Some vehicles, especially those with frameless windows or complex combined regulator assemblies, cost more. Luxury brands and vehicles requiring dealer-specific programming push the price higher.

Is it safe to drive with a rear window stuck open or down?

It's not ideal. An open rear window exposes the interior to rain, dust, and theft. If the window is stuck in the down position, you can temporarily seal the opening with heavy-duty plastic sheeting and painter's tape it looks rough but keeps water out. If the window is stuck in the up position, you can simply leave it alone until you fix it.

One important note: if a child rides in the back seat, a malfunctioning window that goes up and down unpredictably is a safety concern. Disconnect the motor connector at the door until the repair is done.

What are common mistakes people make with this repair?

Replacing the motor without testing it first Always apply 12V power directly to the motor before buying a new one. If it spins, the motor is fine.
Forgetting the child window lock As mentioned, this gets accidentally activated more often than you'd think.
Not supporting the glass When you remove the regulator, the window glass can drop into the door and shatter. Use painter's tape to hold it in the up position before starting work.
Ignoring the other side If one motor has failed at 100K miles, the other rear motor may be close behind. Inspect it while you have the trim panels off.
Buying the wrong part Regulators and motors are vehicle-specific. The wrong part won't fit or won't plug in. Have your VIN ready when ordering.

If you're seeing symptoms where the window goes down but refuses to come back up, our article on why a car window goes down but not up covers that specific scenario in more detail.

Can I fix a rear power window myself?

For most vehicles, yes. The basic process involves removing the door panel, disconnecting the wiring, unbolting the motor and/or regulator, and installing the replacement. You'll need basic hand tools a socket set, trim removal tools, and a screwdriver. Some vehicles use Torx or rivets that require specific bits or a drill.

The job gets harder on vehicles with water barriers (plastic sheeting glued inside the door), integrated electronics, or tight door cavities. If you're comfortable changing brake pads, you can probably handle a window motor replacement. If you've never taken a door panel off, watch a model-specific video before starting so you know where the hidden clips and screws are.

What should I do right now?

Check the window lock button on the driver's door
Try the window from both the door switch and the driver's master switch
Listen for any motor sound when you press the switch
Check the fuse box for a blown rear window fuse
If the motor is silent, test it with direct 12V power
If the motor runs but the glass won't move, inspect the regulator
Order the correct part using your VIN

Start with the window lock and fuse they cost nothing to check and solve the problem more often than people expect. From there, work through the motor, switch, and wiring systematically. A multimeter and thirty minutes of testing will almost always point you to the exact failed component before you spend a dollar on parts.

Explore Design