Driver side window will not go down.

Have you checked the window motor?

Replace the power window switch

sounds like you might need a window motor. if the window goes up and down with help the motor is weak. the clicking is more than likely the relay

these get complicated,. could be just stuck. try holding the the button in the up position while slamming the door. somtimes that will jar it loose.

Sounds like you answered your own question to me.

Replace the regulator assembly

pull off the door panel and make sure the motor is turning and there is nothing blocking the window from going up or down the motor might be burnt out but the switch is still clicking the relay on and make sure you spray the gears and window wires not the electrical wire with white lithium greese

Sounds to me like you have a bad power window relay. Start by checking the power supply to the relay. Should the relay be bad replace and the window movement should be restored. If this doesn't take care of the problem you may need to replace the master switch in the driver door. The master switch allows all the other switches to do their job. If it malfunctions none of the windows will work. Hope this info helps, good luck!!!

Under the Hood there is a Fuse Relay Box that has Relays in it. There is a Relay in this for the Windows. Replace this Relay. If that does not work it very well could be the Motor on the door Making the Noise and you will need to replace the motor.

The black boxes inside the fuse box are indeed relays, which will make a clicking noise. The window buttons are merely contact switches, and if they quit operating properly, the window simply won't do anything, but I've never heard any noises come from one when it quit working. The relays can easily be replaced by hand, so go to a local auto parts store to see about purchasing one, and ask them to show you on their computer screen exactly which relay in your fuse panel is the one that controls the window circuits, and replace it yourself. It's very simple.