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So, your power window's dead. Not moving
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at all when you hit the switch. No
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sound, no click, no nothing. All right,
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don't panic. We're going to figure it
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out. Hey, I'm Tom and this is Car
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Justify. I've been fixing cars longer
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than I care to admit, but I still get
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excited about showing folks like you how
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to track down these little electrical
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gremlins without tearing your whole door
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apart. All right, first thing. Is it
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just one window that's not working or
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all of them? That's your first clue. If
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all your windows are out, we're probably
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looking at a blown fuse, bad relay, or
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maybe even the master switch. But if
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it's just one, then we're zooming in on
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that motor or switch. Okay, let's test
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the switch first, cuz honestly, this is
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where a lot of problems start. You'd be
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surprised how many times it's just gked
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up contacts or a bad switch. You'll need
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a basic test light or a digital
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multimeter. Don't worry, you can grab
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one at any part store for cheap. Pop the
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switch out gently. Don't go Hulk on it.
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and unplug the connector. Now turn the
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key to the on position. Doesn't have to
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be running. And test for power coming
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into the switch. If you're getting 12
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volts on the power wire, that's good.
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Now try pressing the switch up and down
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while checking the output wires. If the
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signal doesn't change, boom, your switch
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is toast. Now, let's say the switch is
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fine. Power's going through it, but the
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window still won't budge. Next up, the
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window motor. This one's actually pretty
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simple to test, but yeah, you might have
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to pull the door panel. I know it's kind
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of a pain, but hey, it's part of the
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fun, right? Once the panel's off, locate
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the motor, usually near the middle of
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the door, and unplug it. Now, grab a
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couple of jumper wires and a 12volt
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power source. You can use your car
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battery or even one of those little jump
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packs. Just make sure you're not
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grounding yourself on anything metal.
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Trust me, learned that the hard way.
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Hook up the wires to the motor. One wire
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to power, one to ground. Doesn't matter
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which way because the motor will just
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run forward or backward depending on the
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polarity. If it spins, then your motor's
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alive and kicking. If it doesn't do
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anything, you've got a dead motor on
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your hands. Oh, and here's a tip. If the
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motor clicks but doesn't move, it might
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be jammed. Try tapping it gently with a
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screwdriver while applying power.
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Sometimes that frees up a stuck motor
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just enough to get the window up. Good
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little trick in an emergency. Also,
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don't forget the window regulator.
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That's the part that physically moves
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the glass up and down. If your motor
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runs but the window doesn't move, you
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might have a broken regulator or
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stripped gear. That one's mechanical,
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not electrical. But hey, that's a video
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for another day. All right, quick recap.
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If your power window isn't working,
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start with the switch. Test for power in
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and out. Then move on to the motor.
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Apply power directly and see if it runs.
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And always check your fuses first. Yep,
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that one trips people up all the time.
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If this helped you dodge a trip to the
2:45
shop, or at least gave you a plan, give
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it a like and hit subscribe for more
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simple, honest car fixes with me, Tom.
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Got questions? Drop them in the
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comments. I check them pretty often
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between jobs. Thanks for watching Car
2:58
Justify. And hey, may all your windows
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go up and down when they're supposed
