Aware of the common problem I check the wires between the doors. I had looked like the previous owner attempted to repair it before...
The black/White cable wasn't soldered unlike the brown cable so I cut it and decided to solder again.
What I had noticed was:
When the black white cable was connected; Passenger Side only went up + Driver's side worked like normal
When it was disconnected; Strangely the passenger side went down when up was pressed! + the driver's did not work at all
I can't get my head around this one!!
