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E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 01-16-2013, 05:08 PM
klobyfl1 klobyfl1 is offline
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Location: Florida
 
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Mein Auto: 1999 323i Convertible E36
Window will not operate above 65 degrees ambient temp

I am experiencing an interesting/frustrating phenomenon with the passenger window on my 1999 E36 convertible. When the ambient temp outside is above about 65 degrees, the window will not operate. If the temp happens to drop below 65, the window begins to operate normally. Anyone have any suggestions where to start troubleshooting this issue?
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  #2  
Old 01-16-2013, 06:34 PM
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dc_wright dc_wright is offline
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Mein Auto: '96 328iC, '04 325Ci
If the window doesn't operate with either it's dedicated button or the button that controls all the buttons that eliminates the switches as the cause. After that I'd suspect a partially mated connector somewhere in the electrical path. The cold could be shrinking the connector body and giving contact and when it warms up it pushes the circuit open.
It could also be worn brushes in the window motor doing something similar.
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Old 01-16-2013, 07:20 PM
klobyfl1 klobyfl1 is offline
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Mein Auto: 1999 323i Convertible E36
Thanks for the suggestions dc. Neither the individual or all windows switches have any effect when it decides to stop working so I would agree it's not the switches themselves. If I get time this weekend I'll try pulling the door panel and see if I can measure current at the motor when activating the switch. If the motor is getting power, then I guess it would be safe to assume something has gone awry internally and it needs to be replaced.
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Old 01-16-2013, 07:31 PM
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dc_wright dc_wright is offline
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Sounds like a plan! Write back what you find!
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