Question about 1999 Pontiac Grand Prix

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Power Window in 99 Grand Am came down and won't go up

I have Power Windows in my 99 Grand Am, The back passenger window is hardly used, I was driving, hit the automatic window button by accident and it just came crashing down and now won't go back up. I tried putting it "back" on track, but that wasn't the problem. I now have something wedged in the door, holding it in place, put that's just a temporary fix.

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  • Pontiac Master
  • 1,292 Answers

Broken sash clip or broken cable. Read this post

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Replace window regulator Ricks Free Auto Repair Advice

Posted on Sep 30, 2017

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Posted on Jan 02, 2017

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mrgreenz
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SOURCE: 1996 pontiac grand am drivers side window off track how do fix and is it hard not power windows

remove the door panel, from the inside you should have access to the window. lift the window up unto the raling. Check to see if the railing is not bent or why the window came off the railing.

Posted on Nov 02, 2008

FoRdMaStEr
  • 51 Answers

SOURCE: 99 jeep grand no power lock or windows on passengers

check the wires that run from the door to the body near the hinges. they always break inside that rubber boot.

Posted on Jan 07, 2009

  • 49 Answers

SOURCE: 1998 PONTIAC POWER WINDOW PROBLEMS

the swithes are going out

Posted on Feb 07, 2009

  • 288 Answers

SOURCE: 1995 pontiac firebird power windows will go up and down then stop

its sounds to me like its a voltage drop problem the wires in the door jam by the hinges bend flex and crack and lose there abilaty to carry the amperage needed to lift the widow. very easy test to do use a dvm on 2 volt scale one lead to neg terminal the other to the ground wire at master window switch should be no more then .2 to.4 voltage drop when motor is running also test power side same way. hope this helps. thunderboltz

Posted on Jun 23, 2009

  • 1986 Answers

SOURCE: Grand Am Power Window Replacement

Are you able to loosen any other bolts that could cause the window to come down more? You could also try manually turning the gears to lower the window...

Posted on Aug 13, 2009

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1 Answer

Power windows won't go down


Window motors bad but if you do end up replacing it, first check for power at the plug going to the window motor when you use the switch.

Jan 01, 2013 | 1997 Pontiac Grand Prix

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Passenger window on my 2000 pontiac gran am gt coupe won"t work


if possible take the driverside window switch out then put it on the passenger side if this works its the switch let me know what happens

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All windows but drivers won't go up or down 2001 GMC yukon


If they sound like they are trying to do something it's not the lock out switch . But to be sure pulling out the switch an testing for B+ voltage to and from the switch . Plus pull the other door switches to see if they have B+ voltage and good grounds would be the thing to do.. If you don't know how to check automotive electrical circuits your best bet , take it to a qualified repair shop .
Passenger Power Window Operation
The passenger power window switches incorporate window up and down relays. The relay coil feed and supply sides are powered through the RAP fuse supply voltage circuit. The normally closed contacts of each relay is connected to ground. The load side of each of the relays are connected to either side of the power window motor through the power window up and down circuits. The up and down relay control circuits are connected to the normally closed contacts of the passenger window switch. These contacts are wired in series with the power window master switch, through the power window master switch up and down signal circuits and then to ground when the power window master is placed in the up or down position. This allows for the up and down operation of the passenger power window from the power window master switch. The center pole of the passenger power window switch is also connected to ground and will energize the relay when placed in the up or down position.

Driver Power Window Operation
The driver power window is unique from the passenger power windows in that it does not use window up and down relays. The driver power window is operated directly from the power window switch.
The normally closed contacts of the switch are connected to ground and the center pole is connected to the RAP fuse supply voltage circuit. By placing the left power window switch in the down position, voltage is applied to the power window motor left front down circuit and to the power window motor. The other side of the power window motor is connected to ground through the normally closed contacts of the left power window switch through the power window motor left front up circuit and drives the window down.
By placing the left power window switch in the up position the polarity of the motor is reversed and the motor drives the window up.

Has circuit breaker for B+ power
• PWR WDO CB 25A (fuse block) (System power for left and right windows 2-door vehicles. System power for LF and LR windows 4-door vehicles)
• PWR WDO CB 25A (IP wiring harness junction block) (System power for RF and RR windows 4-door vehicles)

Could be passenger door switch .

Aug 21, 2017 | 2001 GMC Yukon XL

1 Answer

99 jeep grand no power lock or windows on passengers


check the wires that run from the door to the body near the hinges. they always break inside that rubber boot.

Dec 28, 2008 | 1999 Jeep Grand Cherokee

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Check the wiring between the drivers door and the A pillar(the body of the car). Sometimes the harness breaks from opening and closing the door.

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1 Answer

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Test the window switch for proper operation at both switches, if neither works then you will have to replace the power window motor.

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