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99 chevy venture power window solved problem


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tomhart86
New User

Aug 17, 2008, 9:46 PM

Post #1 of 5 (12973 views)
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  post locked   post icon 99 chevy venture power window solved problem  

I have a 99 chevy Venture. The pass. window went down but won't come back up. Both the driver side switch and passenger switch worked in putting it down, but niether will work in bringing it up. The driver side window works fine. This is the 2nd time this has happened. The 1st time was about a year ago. When we took it in to be checked the mechanic tried to raise the window 1st and it came up so we did nothing. It had worked fine until 2 days ago. The wiring looked o.k. in thr door when I took it apart. Any clues?


(This post was edited by tomhart86 on Aug 18, 2008, 11:03 PM)


Jeff Norfolk
Enthusiast
Jeff Norfolk profile image

Aug 17, 2008, 11:05 PM

Post #2 of 5 (12957 views)
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  post locked   Re: 99 chevy venture power window [In reply to]  

If neither passenger or drivers switches will operate the window than the problem is likely the window motor itself. You might be able to get it back up by holding the window button up and baning on the door panel with you hand. Don't be shy, give it a good wack or five. If you want to check it and fix it here is how. The passenger switch will have 7 wires coming out of it. Focus only on the dark blue and the brown wires. These wires will always be power and ground going to the motor. Depending on if up or down is selected on the switch will depend on which is power and which is ground. One will alway be power and the other will alway be ground. Back probe the plug that is in the switch with a test light and work the switch. If all is well with the contols then motor is bad. If all is not well then switch is bad. Good Luck
Jeff


DanD
Veteran / Moderator
DanD profile image

Aug 18, 2008, 8:47 AM

Post #3 of 5 (12958 views)
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  post locked   Re: 99 chevy venture power window [In reply to]  

With you saying the window will go down, we know the motor is or likely is ok. You already have the door panel off; so unplug the motor and connect a test light across the two wire plug. The test light should light in either direction (up or down).
Again with you saying that the window will go down we also know that the wiring between the switches and the motor are ok. If there was a broken wire the window wouldn’t move at all.
With these years of GMs all window motors wiring is connected to ground (with the switches at rest) through the master (drivers) switch.
When you push up or down on the master switch you’re removing ground from one of the two wires to that motor and applying power.
When you push up or down on the passenger switch you are removing the connection to ground going to the master switch and applying power down to the motor.

Here’s a diagram for this van’s windows; it might help make sense of what I’m trying to say. Diagrams are always drawn with switches, relays or whatever in the rest position.

Dan



Canadian "EH"






bill8488
New User

Dec 22, 2011, 3:09 PM

Post #4 of 5 (10701 views)
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  post locked   Re: 99 chevy venture power window [In reply to]  

DanD,
You are fabulous at providing just what is needed. I worked on my passenger side widow before finding your post. NOW, it all makes sense.
God keep our land glorious and free!
O Canada, we stand on guard for thee.
We Americans will always be on guard for you (especially since you will be sending us oil in that new pipeline.Cool


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 22, 2011, 4:18 PM

Post #5 of 5 (10696 views)
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  post locked   Re: 99 chevy venture power window [In reply to]  

You're welcome to read and utilize the archives but please don't respond to old threads. This one is 4 years old. The original poster dpesn't want to start receiving notifications again.




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