My rear windows never went up or made any noise before but today while driving i decided to mess around with the switch & they finally went up but the alignment was off so i rolled em back down. I parked my car but ever since then my rear winows wouldnt go up anymore or make any noise, is it the motor or wiring thats messed up? Help please

Pretty common problem on the 240sx convertible rear windows...

This might get you started - rear-1-4-window-switch-question-t452527.html

Removing the rear interior panels and applying power and ground direct to the rear window motor will tell you if it's the switch or the motor... My bet is the plastic guide pin(s) have cracked.

Keep us posted!

thank you, i'll start checking it out tomorrow !