I am having an issue with the drivers window on my 98 Z34. If i use the express down feature, after a couple if minutes the window will not roll back up. After I press the up switch, the window will roll up after a minute or so. It seems like the motor is staying on after the window is completely down and overheating the motor. Once I push the up switch, the down function releases allowing the motor to cool, which then allows tthe window to roll up.

I have the service manuals, but there is no schematic for this circuit. Is there a down limit switch involved? It has been a little chilly to take it apart so far. It is not a real big deal, except for the other day when the wife took it to the automatic car wash...

I'm new here, thanks in advance for any help!

Sounds like the window switch may be sticking and not releasing when you let up on it ? You could try removing it from the door panel and cleaning it with the appropriate electrical cleaner to see if that helps . You might have to replace the switch ? Good luck !