Mine would not shut off unless the door was closed.

As the plastic vacuum lines harder they tend to crimp at door openings, especially the driver's door. I found it by turning off the car with the driver's door closed and then opening it up. I listened down near the rubber boot where the lines are routed from the door frame to the door. Try just the opposite approach.

My fix was to splice in the rubber repair hose, and it has lasted so far.

Final note, unlike other leaks I have had in the past, it was easy to find, a bear to fix. You have to remove the door panel, the drivers kick panel and work in some extreme tight places. If this is your issue, be sure to keep the hoses accessable while you are working on them, as it would be very easy to lose one that would be next to impossible to recover from behing the interior door frame.

Good luck

JCD