Hi I recently bought an Rx7 FC 1990 Vert top but have ran into the problem that the left window does not roll up or down. Please comment if you know what the problem might be caused by or what I can do to fix this. Thank you

 

first check the switch, they are known to get cruddy

take it apart inside your house over a tray there are some loose parts that if they fall out you dont want to lose them

 

I agree with Rob, it's almost always the switch.