2004 Malibu Classic Rear window issue

Reply Subscribe

Thread Tools

Search this Thread

Sep 24, 2011 | 9:20 PM

#11

kevinkpk

CF Monarch

Joined: Jul 2011

Posts: 5,920

Likes: 140

From: kevinkpk

Quote:

Originally Posted by EinST

Please read my post #7 above carefully. The motor is fed power over two wires, one battery voltage and the other, ground, when actuated. The motor winding cannot be electrically grounded through the housing because the motor needs to turn clockwise as well as counterclockwise depending on the power polarity.

I'm kinda thinking one is up, and the other reverses the polarity for down (or rather reverses the power into the mootor)? Just thinking, up, down?

Sep 24, 2011 | 9:39 PM

#12

kevinkpk

CF Monarch

Joined: Jul 2011

Posts: 5,920

Likes: 140

From: kevinkpk

I have alot of respect for EinST post, very informative. About the power window, i went back and thought about it. He might be right, as I agree with his logic. I looked in my 96 lumina manual (power windows are.....) Looks as if the power is switched either up or down. I didn't see a ground wire on the motor in the diagram. Didn't mean to step on anyones toes.

Sep 25, 2011 | 8:25 AM

#13

EinST

CF Veteran

Joined: Mar 2011

Posts: 1,709

Likes: 5

Sometimes there's no easy way to explain something in writing which is probably why there's so much confusion out there. As long as I'm party to this thread, I didn't want it becoming another source of misinformation.

Sep 26, 2011 | 11:32 PM

#14

quack332002

Thread Starter

CF Beginner

Joined: Sep 2011

Posts: 5

Likes: 0

Quote:

Originally Posted by EinST

If by "new switch," we're talking about the left rear window switch, i.e., the switch on the driver side rear door, it gets both the power and ground from the driver window switch, i.e., the master switch. Window rolling down but not up would mean the PPL wire is not getting the ground. If the symptom were consistent with both the master switch and the left rear window switch, the fault would be within the master switch.

EinST is the man. Brought out the multi-meter and hooked it up to the plug connector on the side that wouldn't roll up. Check out that when press down on the master switch (driver switch), meter reads 11.78 v. When press up meter reads 0.00 v. Ordered in a new master switch and everything is dandy. Thanks EinST! Send me the invoice.

Sep 27, 2011 | 6:54 AM

#15

EinST

CF Veteran

Joined: Mar 2011

Posts: 1,709

Likes: 5

Uh, that's not conclusive. You read voltage with window switch in down direction but no voltage in up direction on the same wire. What about continuity to ground? On the connector at the window motor, if one wire reads voltage with the window going down, it should then have continuity to ground with window going up while the other wire now should read voltage.