2006 Dodge Stratus rear passenger window electrical problems

Hi, I have a 2006 Dodge Stratus that had a broken rear passenger window and it did get rained in. I recently replaced the window motor and regulator. I got the replacement from a local pick and pull/ scrapyard. I also replaced the glass. My problem is the regulator will only roll up on this particular door. I bought 2 other regulators and motors as I had a feeling my other windows would go out soon. And all of them will roll up but not down. I tried them on my driver side rear window and they worked fine up and down. I need the regulator to come down so I can line up my bolts and secure my window. I’ve even tried splicing in a new wire harness that came off one of the replacement motors and that didn’t fix the problem. I replaced the window switch as well. That didn’t work either. Does anybody know what the problem could be? I know it’s a wiring issue but where would I look to find the problem and how do I fix it?