Hi. I just noticed last night that the button located on my driver's side front door for raising/lowering the driver's side rear window will "sometimes" raise the rear window but not always! Lowering the window is not a problem but it takes a few tries with the button to actually raise it. This behavior is very easy to replicate too. I do not hear the motor trying to raise the window so it's like it just doesn't receive enough power sometimes. However, the button on the actual rear driver's side door DOES raise and lower the window without any problems. Any suggestions? Thanks!