My power seat won't work on my nissan 350z.

It it most likely a blown fuse

I have a 2003 Nissan 350Z Touring edition, when I bought my car a few months ago, I havd to unplug the switches from under the seats, then use an angle phillips screwdriver, to remove the switch, and take it apart and clean all the debri from over the years(bad design by Nissan to have these switches in these positions) re-assemble the switch and reinstall it on the side of the seats, and plug in the harness under the seat(s) and you should be good to go..Hope this helps you, it sure helped me..Jimmy..