Windows work intermittently in my 99 regal gs, when they stop i grab the weather boot in the door and they work again. this is only windows, not power locks or speaker in driver door

Have you checked your relays and fuses?

need more info , all windows ?

check for a broken wire inside the boot that runs from the drivers door to the body.

should be on the fuel rail, take the plastic engine cover off and you should see the injector rails on either side of the supercharger, got to be real close to the line towards the firewall

My left rear window worked intermittantly and then stopped completely.
I found a broken wire inside the harness where the door hinges. With the door open, I had to pull back the rubber boot from the sheet metal to expose the wires. I soldered some connectors on the ends of the broken pieces an then taped it well. It looked like it had been pinched at some point, but I'm not sure why since it is fairly well protected. I guess it had just bent too many times.

There is no type of sensor in that system, however the problem could be a broken wire inside of the weather boot that runs between the door and the body of the vehicle. (The broken wire(s) will most likely be inside of the driver side door weather boot, but it could also be inside of the weather boot on the door that has the window problem)

If the window does go part of the way back up then most likely the window regulator assembly or the drive gear between the regulator assembly and the power window motor is damaged, and the door panel will have to be removed to inspect for the actual problem.

Here is a wiring diagram of a typical power window circuit for that year and vehicle to help assist you.

That is either bad contacts inside of the master window switch on the driver side door, and you can actually take apart those old switches and clean up the contacts with an emery board type finger nail file, or the problem will most likely be a broken wire(s) inside of the weather boot that runs between the driver side door and the body of the vehicle. Try turning the ignition to the "Run" position and then move the weather boot between the door and the body of the vehicle around while at the same time holding a window switch down in the direction that you want the window to move, and if the window does work while moving around the weather boot then there is a damaged wire(s) that will need to be repaired, and any wires that you find broken should be soldered back together and do not use wire connectors to repair the wires. (However, if the wires are too far apart inside of the weather boot then this test will not show any results) and if there is no damage to the wires at the wire connector to the master window switch, then the wires leading from the master window switch out through the door and the weather boot will have to be inspected thoroughly for any damaged wires.

The problem will most likely be a broken wire in the weather boot between the drivers side door and the body of the vehicle. Be sure that if you find any broken wires that you do solder them well, use the same gauge wire if you need to lengthen a wire, and do not use wire connectors.

The problem could be in the master window switch on the drivers door, or the window motor could be going out, but most likely the cause is a broken wire inside of the weather boot that runs between the door and the body of the vehicle, and the broken wire is making intermittent contact because the door is being opened and closed all the time, and sometimes the wire will touch and make the connection and that is why it only works sometimes.

Try this the next time that the window stops working, hold the window switch down in whatever direction that you want the window to go (up or down) and while holding the switch in that position open and close the drivers side door and move or wiggle around the weather boot that contains the wiring that is between the door and the body of the vehicle, and do the same for the passenger side door, if the window starts working while you are holding down the window switch and opening and closing the door or moving around the weather boot between the door and the body of the vehicle, then there is a broken wire or even wires that will need to be repaired.

The broken wire can be on either the passenger side, or most likely on the drivers side, and if you do find a broken wire or wires, then you should repair the wires by soldering them well and use the same gage wire if you need to lengthen the wire to repair it successfully, and do not use a wire connector if you want the repair to last.

i have had this issue before all i had to do is do a new ground, jumped the safety window lock, as well as expanding the metal clips in the wire con.