How can I find out what the problem is with the passenger window, the switch will close the window if it has been opened via the drivers switch, but will not open it
most likley cause is a bad contact inside passenger side window switch.make sure connector on back of switch is firmly fitted.have opened units up in the past to clean,can be very difficult to reassemble,best to replace.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.