Power windows 83 300D Problem

[Dieselkraut23]

So the motors work and the bottons work....but not together...its only the back driver and front passanger side which i know are linked (ive had quite a few of these cars)...my buddy slammed his fist on the passanger front door panel and that window did start to work for about a day...but the back driver side never did....i replaced the two front doors and converted them from manuel to electric and cleaned the connections....BUT the front passanger door that worked when banged wont work at all...i tested the wires and they arent broke but its not getting juice...the motor is good and the bottons...and the back has always been dead tested the bottons they work and the motor works...so before i start ripping out wires anyone had this probelm...or is there something that always seems to fail? ive had alot of thse cars but could always fix this pretty easy.


BTW no wires are broken at the hinges so wtf?