Transporter T5 electric window problem

[paulm270582]

Hello, I have a VW Transporter T5, with electric windows on a 54 plate. The problem is the passenger electric window switch is not working. At night the switch is not lit up red like the two switches in the drivers door. So I presumed it was the switch but then had a thought that should the window work using the passenger switch on the drivers door? Because it doesnt. Has anybody had this experience or any knowledge of this? I want to try to make sure it is the switch before buying another.

[abbie100_0]

The switches on T5 are prone to moisture problems pull it apart and look for signs of green powder.The control unit for pass. window is in drivers door,also does the heated mirror function work.