Power window wiring issues


GothamProtector
04-18-2006, 02:24 PM
Folks,

1999 Chevy Venture.

Power windows had two problems. Earllier this winter (and last) the driver's side window was slow and had to be manually helped up as it seemed to come up crooked. I can live with that. Had old vehicles with one irritant or another all my life. BTW the fix is here: http://www.my-chevy-venture.com/venture-repair-drivers-side-power-window.html

However, about 2 weeks ago the windows or switch module started to make an intermittent buzzing sound when putting them up and down. Then they just quit. I hadn't had time to look into it until this weekend.

I've surfed around here for a couple of days since google pointed me here. Interesting applicable thread for GM minivan owners:
http://www.automotiveforums.com/vbulletin/showthread.php?p=4000033#post4000033

Here is some real good info that helped. His schematics are better than the ones in my Hayne's manual.
http://www.my-chevy-venture.com/driver-side-window-switches.html

I have tested the switch module, which looks good. It appears to be shorting the right pins together when the switch closes and opens.

I decided to have a look at the wiring under the mats. There was corrosion and salt buildup all over the driver's side harness just 2" in front of the T that goes across under the seats.

Looking closer I saw a 2-wire yellow to 3-wire yellow wire underneath a black-taped splice. It was totally disintegrated! I replaced it, thinking that was the trouble. I tried soldering it with resin-core solder but the 20-guage stranded copper wires wouldn't take solder. So I just added in some 18 guage wire to bridge the gap, spliced it back together and shrink-tubed the whole issue to eliminate salt water issues.

No fix to the windows though.

I have tested the motor module, which is getting no juice, even after replacing that splice.

I have a couple of open questions:
1) does the yellow wires have anything to do with the window motors. The schematic at http://www.my-chevy-venture.com/images/Power-Window-Schematic.gif indicates "3 YEL" coming from the PWR WDO circuit breaker throuigh to the window-switch-master module. However the switch module has no yellow wires!

2) People keep mentioning a breaker (and there's one in the schematics) on the motors in behind the door panel. How the hell do I find it and reset/replace it? I think maybe that wiring was bad and possibly the breaker was tripped? Not sure though.

Thanks folks, The Batman has to feel the wind through his ears again soon. This suit is damn hot.

GregA
04-18-2006, 10:37 PM
I have a couple of open questions:
1) does the yellow wires have anything to do with the window motors. The schematic ... indicates "3 YEL" coming from the PWR WDO circuit breaker throuigh to the window-switch-master module. However the switch module has no yellow wires!

2) People keep mentioning a breaker (and there's one in the schematics) on the motors in behind the door panel. How the hell do I find it and reset/replace it? I think maybe that wiring was bad and possibly the breaker was tripped? Not sure though.
Hi Batman :smokin:
1) I'm pretty sure the diagram I have there is for the 2001 version of the van. They could have changed colors between those years. Of course the picture that I have there (of the bottom of the window switch) does match the schematic, but mine is a 2001. If you want, I could look into the 1999 version and see if there is any difference. Just let me know.

2) I seem to remember that the Window Motor circuit breaker is "integrated" within the motor, and that it should reset itself after it cools off. But I could be wrong, or have a faulty memory. :icon16:

Take Care,

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