There is power to the regulator. At first the window rolled down but would not roll back up. Then worked after cutting the car off and switching it back on. This happened on and off for months.Then it would not roll back up. It works when straight wired to a seperate power supply. Replaced the regulator, 4way window switch in drivers door, and swapped working switch from other side. Can you tell me why the window will not roll up? HELP! We have got the window up for now and unplugged it so it could not go back down. :banghead:

I may be able to help on this one, I had the same problem, only it wouldn't work even if I turned the car on or off. It would go down at the switch for that door, but would not go back up. The drivers switch would not move it at all. It turned out the wire between the Driver's door switch and the wire harness below the steering wheel was cut. This is common because the wires constantly bend as the door opens and closes. Before you buy anything more, check the wires at the drivers door, and the door thats not working. You should take the door panel off for this, and use an ohmeter to check for continuance. If you need more details, let me know.