Power Window Goes Down but Not Up: Testing and Fixing the Window Motor

You press the window switch and the glass slides down without a problem. You press it the other way and nothing happens. This is one of the most frustrating car problems because it feels random the motor works, the switch works, but only in one direction. Understanding why your power window goes down but not up saves you from overpaying at the shop and helps you decide whether this is a quick fix or something more involved.

Why would a power window work in one direction but not the other?

A power window that goes down but won't go up usually points to one of three things: a bad window switch, a failing window motor, or a worn-out window regulator. The reason the window still goes down is that the switch sends power in both directions separately. When one side of the switch fails, you lose movement in just one direction often the up direction because it works against gravity and draws more current over time.

In most vehicles, the driver's side master switch controls all windows. If only one window has the problem, the issue is likely local to that door. If all windows behave the same way, the master switch or a shared fuse could be the culprit.

How does a power window system actually work?

Before you start replacing parts, it helps to know what each component does:

Window switch Reverses the polarity of the electrical signal to tell the motor which direction to spin (up or down).
Window motor A small DC motor inside the door that converts electrical energy into rotational motion.
Window regulator The mechanical assembly (cables, gears, or a scissor mechanism) that converts the motor's spin into the up-and-down movement of the glass.
Wiring and connectors Carry current from the fuse box through the switch to the motor.

When you push the switch up, it sends current in one polarity. When you push it down, it reverses that polarity. If the circuit is broken on one side of the switch or if the motor struggles more in one direction, you get this lopsided failure.

What are the most common causes?

1. Worn or burnt window switch contacts

Inside the switch, small metal contacts press together to complete the circuit. Over years of use, these contacts can corrode, arc, or wear down. The "up" side tends to fail first because the motor pulls harder when lifting the glass against gravity. If jiggling or pressing the switch harder temporarily works, the switch contacts are almost certainly the problem.

2. Failing window motor

A motor can lose strength in one direction before it dies completely. Brushes inside the motor wear unevenly, and carbon buildup can block current flow in one polarity but not the other. If you hear a faint clicking or see the glass twitch when you press "up," the motor may still have life left but is on its way out. You can compare symptoms of a bad regulator versus a failing motor to narrow things down.

3. Broken or slipping window regulator

If the regulator's cables fray or a plastic gear strips, the motor may spin freely in one direction but catch in the other. You might hear the motor running with no glass movement, or the glass may sag, tilt, or move unevenly. Cable-type regulators are especially prone to this because the cable can jump off its track going one way.

4. Wiring or connector issue

Corroded connectors, pinched wires in the door hinge area, or a loose ground wire can interrupt current flow in just one direction. This is less common but worth checking if the switch and motor both test fine.

How do you figure out which part is broken?

A methodical approach saves time and money. You only need a multimeter and a basic set of hand tools.

Step 1: Listen and observe

Press the switch up. Do you hear the motor at all? Does the glass move even slightly? If the motor makes no sound and the glass doesn't move, you likely have an electrical problem (switch, wiring, or motor). If the motor sounds like it's working but the glass stays put, the regulator is suspect.

Step 2: Test the switch with a multimeter

Remove the switch panel from the door or dash. Set your multimeter to continuity or resistance. Probe the switch terminals while pressing "up." If you get no continuity on the up position but you do on the down position, the switch is bad.

Step 3: Test for voltage at the motor connector

If the switch checks out, unplug the motor connector inside the door. Press the switch up and probe for voltage at the connector. If you see 12V, the wiring and switch are fine the motor is the problem. For a detailed walkthrough, see this voltage test procedure when the switch is good.

Step: Bypass the switch to confirm

You can apply 12V directly to the motor connector (reversing polarity to test both directions) using jumper wires. If the motor runs down but not up when powered directly, the motor needs replacement. If it runs in both directions, the problem is upstream in the switch or wiring.

How do you fix a power window that won't go up?

Fix 1: Replace the window switch

This is the easiest and cheapest repair. Window switches cost between $15 and $80 depending on the vehicle. On most cars, you pry the switch panel out of the door armrest, unplug the connector, and plug in the new one. No programming needed. Swap takes under 15 minutes.

Fix 2: Replace the window motor

Window motors run $30 to $100 for most vehicles. You'll need to remove the door panel and sometimes the window regulator to access the motor. Some motors bolt directly to the regulator assembly. Reconnect the wiring, test before reassembling the door, and you're done.

Fix 3: Replace the window regulator

If the regulator is broken, you'll typically buy a regulator-and-motor assembly together for $50 to $150. This is the most labor-intensive of the three repairs but still doable in a driveway with basic tools. Make sure to support the glass with painter's tape while you swap the regulator so it doesn't drop.

Fix 4: Repair wiring

If you traced the problem to a corroded connector or damaged wire (common in the rubber boot between the door and the body), clean the contacts with electrical contact cleaner or splice in new wire. This fix costs almost nothing but requires patience.

What mistakes do people make when diagnosing this problem?

Replacing the motor when the switch is bad. Always test the switch first. A new motor won't help if the switch isn't sending power to it.
Skipping the voltage test. Guessing wastes money. A multimeter costs less than a wrong part purchase.
Forgetting to check the child lock or window lock button. On some vehicles, the master window lockout switch disables the passenger windows. Make sure it's off.
Not supporting the glass before removing the regulator. If the regulator is disconnected and nothing holds the glass, it can fall and crack inside the door.
Ignoring intermittent problems. If the window works sometimes, the issue will get worse. A loose connector or corroded contact won't fix itself.

Should you fix it yourself or take it to a shop?

If you're comfortable removing a door panel and using a multimeter, most of these repairs are DIY-friendly. A shop will typically charge $150 to $400 per window including parts and labor, depending on the vehicle and the repair needed. Doing it yourself cuts that to just the cost of parts.

Take it to a professional if the door has side-impact airbag wiring inside the panel, if you can't identify the problem after testing, or if the window is stuck in the down position and rain is in the forecast.

How do you get the window up temporarily?

If you need to close the window right now while waiting for parts, try these tricks:

Press and hold the switch while slamming the door. The vibration can momentarily free stuck motor brushes.
Push the glass up by hand while holding the switch. Sometimes the motor just needs a nudge to get past a dead spot.
Remove the door panel and apply direct power to the motor. If the motor still has some life, direct 12V may get the glass moving.

These are temporary measures. The underlying problem still needs to be fixed.

Practical checklist: power window goes down but not up

Confirm which windows are affected just one or all of them.
Rule out the window lock switch.
Listen for motor noise when pressing "up."
Test the switch for continuity in both directions.
Test for voltage at the motor connector.
Apply direct power to the motor to isolate the regulator.
Replace the faulty component (switch, motor, regulator, or wiring).
Test the repair before reinstalling the door panel.

Tip: If you're still unsure whether the motor or regulator is to blame, this breakdown of faulty window regulator symptoms versus a bad motor walks through the specific sounds, movements, and test results for each. Take 20 minutes to diagnose before you buy it could save you a second trip to the parts store.