hopefully you guys can help

i have a 03 g35 coupe ive been having issues with both driver and passenger windows not working at all ive changed the driver side window motors that i have purchased from car quest about 5 times and they all seem to be going out, i really have given up on finding out whats wrong with it until now dont know what it could be thats making them not work. also my passenger one just started to go out the only way for me to make it work is by beating on the door for it to work normal but it will noly work for like a hour then i would have to beat on it again.


hopefully someone can give me some good feedback

also doors wont lock at all even if i hit the switch


thanks