if my power windows don't work at all is it the switch or motor

 

it could be either one. do a little troubleshooting.

 

or a fuse
or a wire
or not having the car turned on

 

most common thing to go on the Z is the left window. I replaced it with a used motor with labor around 80 bucks. Check the switch as well , my right window went and it was the switch, I aquired at a local salvage yard .