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  #1  
Old 06-02-2012, 11:53 AM
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Power window issue '85 300TD

Greetings. I was wondering what the passenger front and driver rear window had in common. They both stopped working at the same time. I do not believe it is an issue with the lift motors.

Thanks in advance for the help as always!

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  #2  
Old 06-02-2012, 12:17 PM
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Originally Posted by pinpoint View Post
Greetings. I was wondering what the passenger front and driver rear window had in common. They both stopped working at the same time. I do not believe it is an issue with the lift motors.

Thanks in advance for the help as always!
A fuse, maybe also a relay.

Check the fuse box for the lettered fuses in the corners. Or look for the fusebox sticky. There is also fuse 12 that connects to the window relays - and many other things - but if the other side windows work, then that fuse may be assumed to be functioning.

The windows are on diagonal circuits.
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Old 06-02-2012, 12:30 PM
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Yes- the other two windows are operating fine, so I am guessing not fuse or relay (unless these two are on a diff circuit- guessing they are not). Thank you.
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  #4  
Old 06-02-2012, 12:40 PM
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Those 2 windows share a fuse. Open the fuse box under the hood and replace the blown fuse. That is the first step in troubleshooting windows.
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  #5  
Old 06-02-2012, 12:47 PM
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Originally Posted by pinpoint View Post
Greetings. I was wondering what the passenger front and driver rear window had in common. They both stopped working at the same time. I do not believe it is an issue with the lift motors.

Thanks in advance for the help as always!
The Fuses are set up so that 2 windows diagonally a crossed from each other share a Fuse.

When that happened to me a quick check of the Fuses did not reveal anything abnormal.

But, when I pulled the Fuses I found the tip of the Fuse burned/eroded away.

Get rid of any Fuses that have Plastic Bodies. The Best Fuses are Ceramic and Copper; next best Brass.

If there is something Blowing the Fuses I would look for a Wiring issue where the Doors Hinge. Althouh, the short could be anywere along the circuit.
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  #6  
Old 06-02-2012, 03:37 PM
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Originally Posted by ytmtnman View Post
Those 2 windows share a fuse. Open the fuse box under the hood and replace the blown fuse. That is the first step in troubleshooting windows.
Great advice- it happened to be the "a" fuse- which by my first visual inspection looked fine. Closer investigation showed that it was indeed blown. Simple fix for a very aggravating problem that I have had for some time.

Thanks very much!
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Old 06-02-2012, 06:30 PM
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Originally Posted by Yak View Post
...maybe also a relay.
If any combination of windows operate, the power window relay cannot be problem.
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Old 06-02-2012, 09:10 PM
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Might as well add the Power Window Relay is Behind the instrument Cluster and shares a Fuse with some other components.

I believe it is the #12 Fuse on my year and model but be sure to look at your Fuse Chart to be sure.

If all of you Windows were to suddenly stop working that Fuse could be the cause.
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  #9  
Old 06-03-2012, 09:13 PM
Yak Yak is offline
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Originally Posted by tangofox007 View Post
If any combination of windows operate, the power window relay cannot be problem.
So you're saying the windows don't have a relay in common?

You see, I was answering his unasked but implied question, "What do they have in common?" And, as you so astutely noted, they do share a relay. And a fuse. Several fuses in fact. Fuse 12, the main relay, then fuse a - for the specific windows in question.

It happens that all four windows share the relay and fuse 12 and also fuse 2, but those are minor details.

That's why my advice (which was correct, BTW, even though he sort of ignored it at first) was for him to check the lettered fuses in the corners of the fusebox. I could have been more helpful, I suppose, pointing him to post 12 here: http://www.peachparts.com/shopforum/general-information/242913-fuse-box-chart-what-fuse-goes-where.html then pointing out the seemingly small print letters in the corner.

Or I could have looked it up, then said "check fuse 'a' in the corner" but then how will people ever learn how to read a fuse chart?

Thanks for being helpful though.
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  #10  
Old 06-03-2012, 09:42 PM
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Quote:
Originally Posted by Yak View Post
So you're saying the windows don't have a relay in common?
I am saying that there is one power window that powers all four windows. You are saying that there are multiple window relays. And you are incorrect.

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Originally Posted by Yak View Post
There is also fuse 12 that connects to the window relays...

On the other hand, it looks like you might not be sure if there are any relays associated with the power windows:

Quote:
Originally Posted by Yak View Post
A fuse, maybe also a relay.
I could tell you, but how will you ever learn how to read a schematic?

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