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Old 12-14-2009, 09:58 AM
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Power windows

I have a 39 4 door sedan. The passenger side power window does not work properly. Most of the time it won't work at all without slamming the door first. Then it will go up. After a while the window drops around 2 to 3" and I have to figure out how to get it to go up again. I have remove the inside panel and noticed the connection from door to body is a pin style connection so I hard wired it figuring it may be a bad connection and that didn't fix my problem. I also looked at the window assembly unit and it looks like when it was originally installed it had to be cut and welded back together to make it shorter to fit within the door. I bought a "it's a snap" window kit and it is to large to fit within the door. I am not good at welding so cutting it is out of the question for me.

My question is do they make different size window assembly's ? or do I have to find someone who cat cut it down and install it for me. Can the electric motor be replaced only ?

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Old 12-14-2009, 10:28 AM
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when the wendow "goes down" does it fall freely or does it "wind" down via the motor?

also is this a 39 chevrolet 4 door sedan?
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Old 12-14-2009, 03:12 PM
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The window lowers as it should slow and uniformed. It is the upward travel which doesn't work properly.

Yes this is a 39 chevy 4 door sedan.
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Old 12-14-2009, 05:45 PM
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can you run a lead straight to the motor and duplicate the problem? if the switch is mounted in the door...and it is a typical gm style, the switch should be ruled out. (not sure it thats what you meant by straight wired).

we have a 39 pontiac 4 door (same body) and the universal window kits i've seen would require slight modification for the rear doors. its possible that you can replace just the motor...but i'm not sure of the brand kit that u have. i would recommend specialty power if necessary to change out completely...they are replaceable.
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Old 12-14-2009, 10:50 PM
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I removed the contact type switch and hard wired the window motor thinking it was the connection that was going me the problem. It wasn't it is the motor. I bought a window kit from Speedway called "It's a snap". It turns out to be way to long to fit in a chopped door. It looks like the window assembly was cut down to fit so now I am stuck. I will check out specialty powers window and see if they are shorter. Thanks
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Old 12-15-2009, 11:41 AM
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the specialty kits are far more adjustable and "customizeable" . I would recommend calling them and asking their recommendation for your vehicle. They will be familiar with the required mods.

if you can cut the new one where necessary, maybe a local shop or even a local hotrodders.com member can tack it together for you? if you've already bought the "its a snap kit" you won't be out anything.
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Old 12-15-2009, 11:43 AM
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you got me thinking about the mods we did on the pontiac rear door window....its been a while. i peeked inside and it is a specialty power kit, and the only mod was the track was cut short and the "track stop" was remounted. no welding required, simply unbolt the "stop" cut to length and reinstall the "stop"
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Old 12-19-2009, 02:14 PM
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If the motor runs OK when the window goes down it should run OK going up.
To operate a DC motor in (2) directions (forward & reverse) the + and - power feed is reversed.
If possible try to disconnect the motor or remove it from the window operating mechanism to make sure the window is sliding freely in the track.

vicrod
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