SOURCE: 2000 pontiac montana power window|locks doesnt
I had a 99 with the same problem, and suggest you check under the passenger side front carpet. Remove the flat door kick plate, lift up the carpet on the front passenger side floor and you will see a large wiring harness running along the floor, wrapped in black tape. Water and salt gets into this harness and will rot out several wire splices that you will see. Look for wires that run from 2 wires down into one (under black tape.) These are spliced together, and rot out. There was several large gauge wires/splices(windows up and down) and I think 2 very thin wires/splices (lock/unlock) . Even if the wires look connected, give them a good tug, they will come apart and be green with corrosion. This is a very common problem and worth the effort to check out. Repairing these splices fixed both the power windows and locks at the same time. Good luck
SOURCE: My 1999 pontiac montana rear sliding power door will not work
I went to bulldogsecurity.com and looked up the wiring diagram for this vehcle. However, prior to checking this part, I would check to see if you have a blown fuse. It doesn't hurt and only takes a few minutes. There should be a fuse for that either somewhere on the side of the dash or near the brake pedal area. If not it may be under the hood, but it should be inside the vehicle. You may have multiple fuse boxes. If it has (2) sliding doors it will have a wire for the auto doors in each kick panel (under the plastic trim/molding) when you open the door and look down you will see all of the trim/molding it should snap out or may be held in place with a screw or (2). Once you remove that you should see the wires. It says for the left side it is either light blue or black and the right side is definitely light blue. Trace this wire until you find out where it ends (the motor or switch to control the auto doors) Then test the switch/motor to see if it is bad.
SOURCE: 04 pontiac montana sliding doors no longer work
the sliding doors on montana assuming there power have a electrical harness on the bottom track that break and jam the doors but unlikly both have this problem do the doors lock @ unlock if not check switch at drivers door
SOURCE: 2002 pontiac montana passanger pwr window
I beleive you need to change the Power Window Switches Module in the drivers side door panel, as these connections are interlinked within this module and it is usually the first part that fails. Especially that you already changed the switches & motor in the passenger door and it still does not work. Once you remove the dual switch module in the driver's side door, you will understand what I mean. Plus it is really easy to access. Good luck! I have the same model, Claude
SOURCE: major power window problems. 2000 pontiac bonneville
I had this problem where only the drivers door power equipment works.
It is caused by a splice under the driver's seat. Spice #S302 where the
input from the drivers door module to the other door modules connects.
It is one of those cheap *** splice that should be outlawed. Moisture
gets in it and corrodes. Cut back the wires till you get the good stuff
and redo it the right way.
Splice S302 can be found under the carpet about six inches before where
the wires go up to the drivers seat. It is in a plastic wrap and tape.
I believe the wires for the window are brown and white.
http://technoanswers.blogspot.com/2012/01/after-alternator-failure-keyless-keypad.html
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Remote will not unlock Rear door ?
http://schematicsdiagram.blogspot.com/2011/12/remote-will-not-unlock-rear-door-on-gmc.html
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Door locks or windows not working on car?
http://schematicsdiagram.blogspot.com/2011/07/door-locks-or-windows-not-working-on.html
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Car door will not close?
http://howtobyme.blogspot.com/2011/11/car-door-will-not-close.html
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All power door locks not working on?
http://howtobyme.blogspot.com/2011/11/all-power-door-locks-not-working-on_14.html
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Repairing car Door lock Actuator?
http://howtobyme.blogspot.com/2011/11/repairing-car-door-lock-actuator.html
How to Access car door panel?
http://howtobyme.blogspot.com/2011/11/how-to-access-car-door-panel.html
Vehicle door panel components?
http://howtobyme.blogspot.com/2011/11/vehicle-door-panel-components.html
----------Front Door dis-assembly diagram?
http://repairhelpcenter.blogspot.in/2012/02/front-door-dis-assembly-diagram-for.html
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Rear Door dis-assembly diagram?
http://repairhelpcenter.blogspot.in/2012/02/rear-door-dis-assembly-diagram-for.html
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How to test Power door locks?
http://repairhelpcenter.blogspot.in/2012/02/how-to-test-power-door-locks.html
--------This will help.Thanks.
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