Just so you know, the motor is in the trunk. It is on the drivers side
outboard of the hinges. It is at the mounted near the top. It is
cylindrical and has a metal tube coming out of it. Don't mistake it
for the power antenna unit, which is a black rectangular box.
I'm not saying that the motor is suspect, but it is something to check
that is easier to access since it doesn't require removing the
headliner. Make sure the plug is on tight and is corrosion free.
If it fails in the open position, there is a manual mechanism on that
drive unit. It takes forever to operate, but it will keep the rain out
after a few minutes of work.