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Old 12-03-2017, 11:57 PM   #1
Justafour
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Join Date: Jul 2010
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2012 WRX LTD
DGM Sedan

Default 2012 WRX - both rear windows not rolling down

Need a bit of help. Both of my rear windows don't roll down. This happened a while back and, from what I remember, they both stopped working at once but since no one ever sits in my back seats, I didn't bother fixing it.

To give a little more information, the driver and pass windows roll up and down fine. It doesn't matter if I try to roll down the rear windows from the driver switch or from the rear door switches. No, the window lock isn't on.

I assumed fuse and after some searching I saw that fuse 26 on the interior was supposed to be the power window fuse. I replaced it with no luck.

Any ideas?

By the way, I searched but came up empty handed (other than the fuse # above).
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Old 12-04-2017, 08:16 AM   #2
Charlie-III
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In most cars, there is MLB 1 window fuse, so if one or more work, the fuse is fine (no fuse for each window).

Typical window master controls pass power to the other switches, then onto the window motor. So, start at the window motor, do you have power to it when operating the switch?
If yes, maybe clean and grease the motor.
If not, then check that switch, keep going until you find the issue.

Could even be broken wires in a door hinge inside the rubber tube.
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Old 12-04-2017, 08:17 AM   #3
Charlie-III
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Old 12-04-2017, 04:05 PM   #4
Justafour
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If both windows stopped working at once, wouldn't it be before the motor and individual switches?
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Old 12-05-2017, 08:41 AM   #5
Charlie-III
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Quote:
Originally Posted by Justafour View Post
If both windows stopped working at once, wouldn't it be before the motor and individual switches?
I would say that's a decent assumption, but sorta sounds like they could have failed close together but still different times.

The master switch has a single power in that feeds all the switches.
Each master switch has a dedicated run to its door switch, so looking for something common going on.

I only have older manuals/diagrams so can't really look up your wiring.
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Old 12-06-2017, 08:51 AM   #6
Elbert Bass
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2012 Subaru windows 101: Single circuit breaker for power windows. Driver window motor has isolated circuit and there is logic control in the master switch. The other three window circuits are powered from the window lock switch (from that single circuit breaker). Since each rear window wiring runs down both sides of the car it is doubtful it is a wiring problem in the harness.

Most common, due to lack of use, is the motor brushes are stuck (internal resistance). Worst case the motors are failed.
With engine running hold rear window switch down and bang on the door panel with your fist above the window switch - that may knock the brushes loose. Then you will need to use those windows couple times a week to keep it working. If not then it is time to pull the door panel and check voltages. Got a voltmeter? Know how to use it?
Try banging first and get back to us.

Left hand rear window motor wire in left rear door from switch to motor - red wire and blue wire.
Polarity of voltage across those wires will reverse between switch up - switch down. Ignore voltages at switch rest.
Right hand rear window motor wire in right rear door from switch to motor - red wire and green wire.Same test as above. If voltage flip-flops then odds are motor is toast. If I recall the last time I measured window motors were around 2 to 2.3 ohms resistance - 1 ohm or below is a fail.

New window motors come with a free window regulator!!!!
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Old 12-11-2017, 03:53 PM   #7
Mach V Dan
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Did you check the switch that turns off the rear seat windows so the kids don't roll them down? It's in front of the front left window switch on the driver's door.

--Dan
Mach V
FastWRX.com
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Old 12-11-2017, 06:30 PM   #8
Charlie-III
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Quote:
Originally Posted by Mach V Dan View Post
Did you check the switch that turns off the rear seat windows so the kids don't roll them down? It's in front of the front left window switch on the driver's door.

--Dan
Mach V
FastWRX.com
I believe the "window lock switch" kills 3 windows, not just the rear.
See Elbert Bass reply........
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