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Old 06-01-2008, 02:30 AM   #1
urabus555
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Member#: 102091
Join Date: Dec 2005
Location: North, Ontario, Canada
Vehicle:
1994 1.8l Impreza L
Open Class Build w/110hp

Default All power windows failed at once

Hi and thanks for looking

My wifes car is a 96 Impreza Outback. She was putting the windows up the other day (two at a time) and the rears stopped an inch from the top. Now none of the windows work. I've tried a bit of trial/error work. I removed the door cards on the driver's side. The (green) two wire connector between the rear/passenger window switch and the motor has no voltage normally, +12v when the switch is pressed up (i think - it could have been down now that I think of it), and -12v when the switch is pressed down. I guess that is the most confusing thing to me

The motor should be getting power? No?

In one of my other cars (97 Impreza L) the voltage reads the same and the window works fine.

OK...

I've done this so far:

1- removed door cards on the driver side
2- unplugged all doors (@ a/b pillar) BUT the drivers door - driver's window does not work
3- unlugged all doors but the rear driver door - still no luck
4- checked the window lock swich by switching it to the lock position - no power to the motor in the driver's rear door. switching it to the unlock position - power present.
5- switched the drivers front 'switch box' with a 'spare' I had laying around - same results as with the one in the car.
6- switched the position of all the 'slow burning fuses' in the engine compartment (with ones of the same amp rating)
7- became confused and decided to ask you kind folks for help...

Any suggestion would be greatly appreciated - Thanks
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Old 06-01-2008, 11:14 AM   #2
Cougar4
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Join Date: Jan 2004
Location: Anchorage, AK
Vehicle:
2001 LL Bean Outback
Winestone

Default

The trouble appears to be due to a failure of the power supplied to the whole power window system so that should be checked before getting into the individual window switching. Trying to run two windows at once may have overloaded something.

The info I am looking at shows that power to the windows comes from a circuit breaker that uses a yellow wire to tie to the power window/sunroof relay. The relay is controlled by a circuit using fuse #15, a 10A fuse in the fuse/relay box. The relay should always be turned on while the ignition switch is on. The power runs through the relay contact and the wire color changes to blk/yel. This may be where the trouble is, the relay contacts. Check for power on the yellow wire and the blk/yel wire going to the relay. If you have power on both wires then the trouble is most likely at a splice connection, in the blk/yel wire, that ties to all the window switches. The wire color changes to red going to the driver's switching panel.

The circuit breaker for the windows may be in the power panel under the hood and the relay may be in the dash fuse panel or under the dash somewhere, I'm not sure.
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Old 06-01-2008, 09:14 PM   #3
ProdriveDreams
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Chapter/Region: NESIC
Location: Boston / Ipswich, MA
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W/06 STi Drivetrain swap

Default

agreed fuse and or relay most likely under the dash.
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Old 06-07-2008, 09:25 PM   #4
urabus555
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1994 1.8l Impreza L
Open Class Build w/110hp

Default Still no luck

^^^

Thanks.


I looked at fuse #15 - it was fine.

The thing that really confuses me is that the motors are all getting power (+12v, 0v, -12v - at the conector wired to the motors) from the switches.

I could be making this too complicated (I do that) but is it possible this could have somthing to do with the part of the window control system that senses when the window is all the way up or down...

Could the system belive all the windows are fully up or down?

As a side note I got the windows up by making an 'extension cord' to connect the motors in my wife's car to the door harness in my car.

I would really like to know where to go from here... Without window control, drive-thru windows are going to be fun!
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Old 06-07-2008, 09:59 PM   #5
ringe
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2007 WRX CT Stg 2
WRB

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All power windows seem to share a common ground... when you tested for power at each motor did you loop a test light between the two terminals in the connector? This will tell you if the motors are getting power AND ground.

Thing is, I can't tell from my alldata wiring diagram where the ground is located... The diagram does say "E" over the universal sign for ground, so maybe it's an engine ground. I would suggest checking all of your engine grounds, loosening and retightening all of them.

Edit, wait a sec...I think I'm reading it wrong, sorry I'm not familiar with these, I deal with GM wiring diagrams most of the time...
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Old 06-07-2008, 10:04 PM   #6
ringe
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WRB

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So you're getting power to all window motors... and if you run them off of another vehicle you can get them to roll up and down, right?

The thing that confuses me is that the diagram shows dedicated power and ground circuits for every door. Meaning that even if one switch or motor fails, so long as it isn't the master switch, the others should work. It seems like a new master switch assembly should have solved the problem...are you sure the spare you had was a known good part?
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Old 06-07-2008, 11:41 PM   #7
hwy61
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Can't help. Hwy61

Last edited by hwy61; 06-08-2008 at 12:26 AM.
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Old 06-08-2008, 10:41 AM   #8
Cougar4
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2001 LL Bean Outback
Winestone

Default

As Ringe touched on, the problem appears to be with the ground to the windows since you state that you are getting power to the motors. The data I'm looking at for a later WRX shows that the ground for the circuit ties back through the main switch on a black wire. I think your system is basically the same if I remember correctly. Try back tracking the ground from the main switch to make sure it is ok. I think the lock switch controls the ground to the other windows also but not the driver's.
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