Ok guys so i have a 99 civic hatcback dx and decided to do power door. So i changed the whole under dash harness and put a 00 civic si and also changed out fues box and floor harness all from and si. Everything seems to work on driver door both up and down switches work to both windows. The problem is that the passenger window wont go down using the passenger switch but does work when i click it from driver side. Also whem im clicking it from driver side and its going up or down i click on passenger side and window stops as soon as i press down. Any idea what it might be?

 

I had the same thing happen on mine only mine was opposite mine tou had to click it on the passenger door if I tried to roll both down at the same time with the dual buttons on the drivers door the drivees side would stop until I let go of the passenger one.......I just reached across and hit the passenger button